Hi!
Apparently this is a common issue, but here goes: I'm also unable to use GSX PRO on MSFS due to the "cuatl scripting engine hasnt started" message on my sim. I've tried several fixes i've seen in many pages, inside and outside this forum, i've also downloaded, re-downloaded, installed, uninstalled, updated, re-updated several times and nothing seems to work. I've also waited for more than 20 minutes for the cache to "be done"(?) and i still get the same error message.
i did also try to uninstall and completely delete all files that are related, and all its folders... nothing.
i've also tried starting in different airports (KMCO and SKBQ, both default) and nothing seems to make it work.
edit: i just realized that the app "Start Couatl for GSX MSFS" isn't starting at the same time as my sim either.
i appreciate any help.
Juan.