Version 1.0 · 19 July 2026

Terms

What you buy, what you may do with it, and where you stand if something goes wrong. In plain language, because that serves everyone better.

Illustration: an open notebook with a fountain pen on a small wooden desk by the window

The short version. You buy a licence to use the software, not the software itself. That licence is yours and does not expire. You may not resell or distribute it. I do my best to get everything right, but always verify the output of calculation software yourself.

1. Who the seller is

De Raad Software, sole proprietorship of Damian de Raad, based in the Netherlands, registered with the Dutch Chamber of Commerce (KvK) under number 42200414, reachable at info@deraadsoftware.com.

FlexPIPE licences are invoiced directly. Where the quotation differs from these terms, the quotation prevails.

2. What you buy

You buy a right of use: a licence to use the software. Ownership of the software and the source code stays with me.

The licence is perpetual: it does not expire and needs no renewal
The licence covers the version you buy and all updates within that same major version
A licence covers the number of seats stated in the quotation
The licence key is verified locally — no internet connection is needed to keep working

3. What you may do with it

Yes:

Using the software for your work, including commercially
Making a backup copy
Installing the software on a replacement computer when you change machines

Not:

Reselling, renting, lending or distributing the software or your licence key
Sharing the licence key beyond the number of seats you paid for
Decompiling or modifying the software, except where the law expressly permits it
Circumventing the licence protection

4. Trial period and refunds

Before you buy you get a temporary licence to test FlexPIPE on your own .FLX files. That is the moment to establish whether the software does what you need — after that the purchase is final.

If after purchase the software turns out not to work as described and I cannot fix it, you get your money back. I would rather sell nothing than something that fails to do what I promised.

5. Support and updates

I answer questions about usage by email, usually within a few working days
I fix errors in the software where reasonably possible
Updates within the same major version are free
A next major version may require a new purchase; I will say so in advance

There is no guaranteed response time and no maintenance contract. If you want one, for business use for example, we arrange that separately.

6. Liability

The software is delivered as is. I build it carefully and test it, but I cannot guarantee that it is free of errors or fit for every conceivable purpose.

Important with calculation software. Calculation results are a tool, not a substitute for your own engineering judgement. Always verify results yourself and follow the codes and procedures that apply in your situation. Responsibility for the design stays with the user and their organisation.

To the extent permitted by law, my liability is limited to the amount you paid for the licence. I am not liable for consequential damage, lost profit, loss of data or business interruption. This limitation does not apply in cases of intent or wilful recklessness on my part.

7. Changes

I may change these terms for future purchases. For your own purchase, the terms as they read at the moment you bought remain in force. The version date is at the top of this page.

8. Applicable law

Dutch law applies to this agreement. If we cannot resolve a matter between us, the competent court is in the Netherlands. As a consumer you retain the rights granted to you by mandatory law in your own country.

Anything unclear? Email info@deraadsoftware.com. Better a question up front than a misunderstanding afterwards.