I have computer without internet connection. I have 2 active users on that PC. It's Administrator (with full rights) and User (with simple user rights).
The problem is: under Administrator I have installed Radiant and activated offline paid license. When I logged back as User and opened Radiant, this program showed me a message something like "Hardware configuration change has been found... bla, bla." So, the license has been deactivated. How? How it's possible, if I didn't change anything? I only connected 2 usb flash drives to this PC. That's all!
Ok, I'm going to try to reactivate the license now. But this PC must work with USB flash drives. So, license drop is unacceptable in such situation.
What should I do if the problem repeats again?

Maybe you should contact the devs directly via email instead of user forum?

Dear Eduards,

For priority support please contact us directly via email that you received the license key from. We will be able to try to resolve your issue then.