** This has been answered privately **
So far, hundreds of users have been using Instant Terra's trial license. If you get trouble with yours, please send us back to support@wysilab.com the automatic email you received so we can check and investigate what's going on.
Anyway, we'll be able to send you a valid license.
We put several years of R&D into Instant Terra software, and we are sorry for the bad experience you are having with the back-office. Any people having trouble with the back-office (downloads & license management) should contact us to let us a chance to improve it if needed.
Marianne Calva - Wysilab support