Hey
For those who get error saying Thrive Theme is not compatible with Thrive Architect like me, I went through a bit of trial and error and found out the way to fix this
You need to check Thrive Theme folder name "Architect" and check file version.php it will says exact version of thrive architect it can work with. Exact, not the oldest version it can be compatible with.
So you need to dowload multiple versions of the Thrive Theme here and check.
For example: Theme 1.8.3.1 work ONLY with Architect 2.6.2.1, 1.8.2.1 ONLY with 2.6.1.1
I test many time and when choosing the right version that error message disappear and everything works well!
Do not try to edit that version text in the version.php file to make them match like I did first, that error message disappeared but still I could not edit template pages with Thrive Theme Builder. So you need to download the correct version of Thrive Theme, depending on version of your Thrive Architect