HI
Thanks to both for reaching out. Quite convinced at least one was linked and running the installer did not worked out. In the end I solved the probelm. In the Community folder I added for both "fsdreamteam-gsx-pro" and fsdreamteam-gsx-world-of -jetways" the "-old" at the end. Then launched FSDT Installers did a relink. This created in the Communty folder fresh folders that were linked. Then launching MSFS it worked with no problem.