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Terms and Conditions

Last Updated: 15. April 2025


I. General Terms and Conditions

1. Introduction

These Terms and Conditions (hereby referred to as "T&C") apply to:

  • The website www.centias.com (hereby referred to as "Website") as well as all its subdomains, services and its redirection addresses www.centias.net and www.centias.io.
  • The C# ASP .NET package Centias (hereby referred to as "Software") which is sold on the Website and available for download after purchase through a private NuGet feed.
  • The Update Subscription valid for one year after purchase (hereby referred to as "Update Subscription") which is sold on the Website to all license holders that do not have an active Update Subscription.

1.1 Subject of these Terms

The subject of these T&C is the granting of use of our Software upon successful purchase of a license through our Website, as well as the purchase of any Update Subscription.

1.2 Contractual Parties

The Website, the Software and its Update Subscription are owned and operated by the Linkerion GmbH. Linkerion GmbH (hereby referred to as "Provider", "we", "us" or "our") has its main office in Hallbergmooser Strasse 27, 85356 Freising, Germany. The Provider's VAT identification number is DE351716755.

Please note, that the Provider may refer to you as "Business Customer" throughout this document. The Provider presumes that you are either an organization, a business or a freelancer that buys the Software or Update Subscription for commercial or other business purposes.

Should you be a private buyer, which is any natural person that buys the Software or Update Subscription for non-commercial, private purposes only, you will be classified as a "Consumer". Please note that additional conditions may apply for Consumers (see II. Additional Terms for Consumers).

In cases where no direct distinction between Consumer or Business Customer is made, the terms "User" or "Purchaser" are used instead.

By accessing this Website or purchasing the Software or the Update Subscription, you acknowledge and agree to abide by the T&C as outlined on this site. Please review the terms carefully before proceeding. If you do not agree to these terms, you must not use the Website or purchase the Software or an Update Subscription.

For future reference it is recommended that you download or print these T&C, you may do so by opening the printing dialog provided by your browser and printing to PDF or to a printer.

For any questions contact us at:
support@centias.com

2. Description of Centias

Centias is a C# ASP .NET package intended for developers experienced with this framework. It enables developers to create an administration panel based on C# classes representing entities in Entity Framework Core ("EF Core"). The developer builds Resources based on these entities in order to showcase a list of existing entities, create new entities, show details of single entities or edit existing entities, among other things. The current capabilities of the Software are shown in more detail on the Website or in the documentation linked on the Website.

The Software's capabilities are subject to change with every update. However, the core idea of the Software to create administration panels based on an EF Core database configuration will remain the same.

The Provider expects you as Purchaser to make an informed decision on whether the Software is suitable for your intended purpose after reading the description on the Website or reading the publicly provided documentation.

3. Update Subscription and Renewal Mechanics

Upon initial purchase of a perpetual license for the Software you will be granted a free one-year trial Update Subscription. After the one-year trial period you will be charged for renewal of the Update Subscription. The price for the Update Subscription is dependent on country and local currency. Please refer to I.9.2 Pricing for more information.

You may cancel automatic renewal at any time directly in your User account area. The Website will indicate your subscription status and your license validity.

If you do not cancel this renewal within the one-year timeframe you will be charged the yearly subscription fee and your Update Subscription will become valid for another year. As such we recommend that you cancel renewal in a timely manner if you have no use for it. You can continue to use the Software without an Update Subscription, however, you will cease to receive version updates after your Update Subscription expires.

You may buy a new Update Subscription at any time provided you have no ongoing Update Subscription.

4. Delivery and Provision of the Software and Updates

After your purchase has been successful we will create a User account for you with the purchased license attached to it. We will then send you further instructions by the email you've provided us with during checkout. Should an account already exist with that email the license will be added directly to that account instead.

Should you purchase an Update Subscription the license will be linked to your account and your perpetual Software license.

The Software is downloadable through the Provider's private NuGet feed. The feed can be accessed through a token that can be generated by you in the Website's User area protected by login.

Updates to the Software are also available through the Provider's private NuGet feed. The same access token mechanics apply. Updates can only be downloaded if an active Update Subscription is linked to your perpetual license.

Your User account will be created directly upon completion of the purchase. You will receive an email with further details that allows you to complete the registration process. After you have access to your User account you can generate a token to authenticate with the Providers private NuGet feed. More detailed instructions can be found in the documentation linked on the Website.

Should you already have a User account upon purchase, any new license you purchase will be added to that account instead. An account will be identified by the email address used during checkout.

5. License Validation of the Software

A single license grants the Purchaser the right to use the Software on an unlimited number of development environments. You agree not to circumvent the Software's licensing validation mechanisms in any way. You agree to not share License keys or use unauthorized License keys that were not purchased by you.

You may download the Software on different devices and use the Software for multiple development environments. However, only one production environment may be used with each license purchase. A production environment is bound to a domain of your choosing. The domain can be configured in the User area of the Website.

The Software will attempt to validate your license if it runs on a production environment, this will require an active internet connection. If validation is not possible the Software will not run in production environments, only on typically known development environments. For further information about different environments and licensing validation please refer to the documentation.

6. The Provider's Obligations

  • The Provider will grant you access to the Software through its private NuGet feed, given that you have purchased a license beforehand.
  • You will be granted access to Software updates, provided that you have an active Update Subscription. If your Update Subscription has been cancelled you will still receive updates until the subscription runs out. Without an active Update Subscription you will be able to download your latest fallback version instead.
  • Any substantial changes to the Software will be documented in a publicly accessible change list by the Provider on a per-update-basis.
  • You may continue to use an older version of the Software regardless of any existing updates. The Provider will continue to offer older versions through the private NuGet feed.
  • The Provider will attempt to remedy any major outages to the NuGet feed or the Website in a timely manner.
  • The Provider will attempt to fix any major Software faults that prevent developers from using it for its intended purpose in a timely manner.
  • In the case of a Force Majeure the Provider's obligations are suspended for the time being.
  • The Provider will offer basic email support to the Purchaser, however, response time cannot be guaranteed and depends on the overall volume of support requests. Support only consists of answering questions regarding licensing, receiving bug reports or feature requests. Feature requests may be used by us in the future without attribution or compensation to the requester. Any questions regarding configuration, installation or general use are not included in support and may be handled by the Provider at their own discretion.

7. The Purchaser's Obligations

The Purchaser agrees to uphold the following obligations by using the Software or its Update Subscription:

  • Adhering to the terms outlined in T&C.
  • Using the Software in accordance with the license granted by us.
  • Using appropriate hardware for usage of the Software, regarding internet connectivity for downloads and production use.
  • Creating regular backups of their own data to protect from potential data loss.
  • Protecting User credentials for the Website and access tokens for the private NuGet feed from third parties.

8. Software Restrictions

You agree to use the Website and the Software only as permitted by the T&C and in compliance with all applicable laws, regulations, and accepted practices in your country of residence. You may use the Software for commercial or business purposes, however the following restrictions apply:

You may not:

  • Reverse engineer, copy or reproduce the Website or the Software or any of its parts.
  • Rent, sell or otherwise transfer the Software or any of its parts.
  • Use the Website or Software in violation of any international law or regulations.
  • Use the Centias logo, the Centias name or the Centias trade name as your own.
  • Grant rights to any other individual or organization.
  • Attempt to access the Website's system or tamper with the Website's system in any way that may hinder performance of the Website.
  • Use the Software in any multi-tenant setup whatsoever, doing so will be interpreted as granting rights to others without the Provider's consent.

9. Payment Handling

9.1 Merchant of Record

Whether you buy a single license for the Software or you buy an Update Subscription, all payments will be handled through our Merchant of Record, Paddle. As a Merchant of Record, Paddle enables us to sell the Software worldwide in a secure and timely manner, while being compliant with local regulations. Paddle will process your payments and send you an invoice after completing your transaction. You will find all transactions related to the Software made through the Website marked with PADDLE.NET*CENTIAS in your bank statement or credit card statement. For further information please visit paddle.com. Please also make sure to read Paddle's own terms for Business Customers or Consumers.

9.2 Pricing

Prices will be shown based on your location in your local currency. Specific local pricing may apply in several countries. If no local pricing exists for your location it will default to pricing for Germany in Euros and be converted to your local currency instead. Paddle will handle currency conversion automatically. Please be aware that your bank may charge you with additional currency conversion fees or interchange fees.

All prices are exclusive of VAT or any additional taxes. Any taxes will be calculated by Paddle as soon as you enter your invoice address and proceed to checkout. You may also enter business information and a VAT number in the payment process for Paddle to take into account for any tax related pricing.

Prices are subject to change. We will inform you of any pricing changes that would affect you six weeks beforehand by email. Please note, that currency fluctuations do not fall under price changes, as the base price would not have changed.

9.3 Update Subscription

Whenever you buy an individual Software license you will receive a one-year trial of an Update Subscription. If the Update Subscription is not cancelled before the trial finishes you will be charged by Paddle for the price of a one-year Update Subscription. Please refer to 3. Update Subscription and Renewal Mechanics for further information.

10. Refund Policy

If you purchase the Software you will have the right to withdraw from your contract and return the Software within 14 days. We do not require any reasons for withdrawal.

10.1 Consequences of Withdrawal

If your withdrawal complies with the terms outlined in these T&C, you will receive a refund of the original amount through the same transaction method you used during purchase. Please note that refunds are handled by our payment provider Paddle.

After withdrawal your right to access or use the Software will expire immediately.

10.2 Withdrawal Limitations

Some limitations apply regarding withdrawal, due to the digital nature of the Software:

  • If you have downloaded or used the Software in any way your right to withdraw expires.
  • The right to withdrawal is not applicable for Update Subscription purchases of any kind, including automatic renewals, as Software version updates will be made available to you immediately.

During purchase you will be required to acknowledge our Refund Policy and its limitations.

Each withdrawal request will be reviewed individually. Should we find any indications of fraud or abuse of your right to withdrawal, we reserve the right to deny your withdrawal request.

10.3 How to withdraw

Should you be applicable for a refund and wish to do so please write to:
support@centias.com

Your email address should be the same that your User account is registered with on the Website. You can use the following template for your email for requesting a refund, although usage is not required:

To Linkerion GmbH, with its registered address at Hallbergmooser Strasse 27, 85356 Freising, Germany.

I/we (*) hereby give notice that I/we (*) withdraw from the contract regarding the purchase of the Centias Perpetual License.

Ordered and received on
Name of Purchaser
Address of Purchaser
Place and date of the Purchaser

*Delete as appropriate

11. Warranty

The Provider will make reasonable efforts to ensure that the Software remains in a functional and usable condition, within the scope of the Provider’s capabilities. The usual legal warranty periods will apply.

11.1 Warranty regarding Intellectual Property Rights

We assure that the Software does not violate any third-party intellectual property rights. If any third-party claims arise due to such infringements related to the Purchaser's use of the Software, we will indemnify the Purchaser, covering all associated costs, including reasonable legal fees. The use of the Software does not include any data the Purchaser introduces to the Software by themselves, such as database records, images or any other files not included in the original package version of the Software. The Purchaser agrees to promptly notify us of any such claims and will give us full authority to manage and defend against these claims.

11.2 Warranty Exclusions

Warranty may be excluded in the following cases:

  • Incorrect use of the Software or incorrect configuration.
  • Only negligible deviations of Software quality or impairments to the usability of the Software deemed insignificant.
  • Usage of hardware, operating systems, third-party software, dependencies or other equipment that is not compatible with the Software.
  • If the User does not comply with the specified usage of the Software in the documentation linked on the Website.
  • If a Software fault is known to a Business Customer and not communicated to the Provider in a reasonable time window of 14 days.

12. Personal Data

We may process personal data when you use our Website or the Software. For more information on which personal data we process please read our privacy policy.

13. Intellectual Property Rights

The Provider owns all intellectual property related to the Website and the Software, including but not limited to logos, icons, graphics, text, images, designs, source code, domains, and other content. The Purchaser does not acquire any intellectual property rights by purchasing a Software license, except as is set out in these T&C. All use of intellectual property which is not expressly permitted in these T&C, by applicable law or authorized by the Provider, is prohibited.

13.1 Licensing

By purchasing the Software and accepting these T&C the Provider grants you a perpetual license to download and use the Software in accordance with the terms outlined in the included license and these T&C. This license is limited to its permitted use, non-transferable, non-exclusive and may not be sublet to any other entity. The Provider reserves the right to revoke your license if you violate these T&C or use the Software in any way that is not authorized.

14. Embargo Clause

By buying the Software you affirm that you are not situated in any country that is currently subject to sanctions or embargoes by the Federal Republic of Germany or the European Union. You also confirm that you do not buy this Software as a third party with the intent to circumvent any such sanctions or embargoes.

15. T&C Modifications

We may modify the T&C in the future. Any Purchaser will be informed by email of such changes. The Purchaser has 30 days to object to these changes by email. If the Purchaser has not objected within this time period and continues to use the Website or the Software it will be interpreted as consent to the changes.

In case the Purchaser objected to the changes we will be granted an extraordinary right to terminate all ongoing contracts with the Purchaser within a notice period of four weeks.

16. Dispute Resolution & Jurisdiction

For Business Customers these T&C are exclusively governed by the laws of the Federal Republic of Germany.

The place of jurisdiction for all disputes between the Provider and Business Customers is in the courts of Munich, Germany as far as it is legally permissible.

17. Indemnification

You agree to indemnify and hold harmless the Provider, its affiliates and employees for all claims, damages, losses, costs and expenses arising from or in any way related to your violation of the rights of any third parties.

18. Termination

We reserve the right to terminate your license and your account should a breach of the T&C occur by you. Any refund entitlements will expire with such a termination. Should a termination occur we will contact you beforehand per email.

19. Disclaimer

The following limitations and exclusions of liability apply:

  1. The Provider's liability towards the Business Customer is in relation to the Business Customers's usage of the Website and Software. The Provider is not responsible for any financial losses or damages that arise from usage of the Website or the Software by the Business Customer, unless such damages arise from gross negligence or intent from the Provider.
  2. In case of gross negligence and culpable injury to life, limb or health we shall be liable without limitation.
  3. Should a negligent breach of our obligations occur that are not subject to cases stated in 2., liability shall be limited to the damage typical of the negligent nature of breach of contract.
  4. These limitations and exclusions of liability are further applicable to our employees and all associates.

20. Severability

The invalidity of any provision will not affect the validity of the remaining provisions. If a provision is found to be invalid, it will be replaced with a new provision that, to the extent legally permissible, achieves the economic goals the parties intended with the invalid provision.


II. Additional Terms for Consumers

While Consumers are not our intended audience, we do not have mechanisms in place to prevent Consumers from buying our products. As such, we provide additional terms in this section for Consumers, which are natural persons that buy our products for non-commercial, private purposes only. All terms in section I. still apply to Consumers, as far as legally permissible. These terms extend the terms of the previous sections or restrict them as appropriate.

1. Dispute Resolution

The European Commission provides a platform for online dispute resolution (ODR): https://ec.europa.eu/consumers/odr/.

We are not obliged and not willing to participate in a dispute resolution procedure before a Consumer arbitration board.

2. Jurisdiction

Any limitations regarding jurisdiction and governing law from provision I.16 Dispute Resolution & Jurisdiction does not apply to Consumers.

3. Warranty Exclusions

Regarding I.11.2 Warranty Exclusions, there is no additional timeframe restriction for when a Consumer has to communicate a Software fault to the Provider.

4. Severability

The severability clause I.20 Severability does not apply to Consumers. Invalid provisions shall be replaced with valid provisions reflecting the Consumer's rights instead.