After repeated attempts to install/uninstall all FSDT products, waiting for nodes to update, etc. I was able to get GSX Pro working on MSFS. Everything was happy until I wanted to see if everything was fine with my P3D and I was surprised that I had the same error but now in P3D (coutl scripting error). I uninstalled everything again as indicated in the subject post, GSX returned to work in P3D but again failed in MSFS. Summary: You either have GSX in MSFS or in P3D, not both.
Seriously, how many more times do I have to update with live update, how much longer do I have to wait for your nodes to update? Please let's get serious.
PS: please accept new users in the forum, or maybe you don't want more claims.