since I did not hear anything from you anymore I assume that you´re not in the mood or not able / willing to help.
You are entirely wrong. If you read my last post carefully, I asked TWO things:
1) "But since there are 3 entries for the Addon Manager\Misc objects,
I asked where is installed, to know which lines you must remove" and "With "where is installed", I mean
where was GSX when you uninstalled it last time"
AND
2) If you replied YES to the question "Do you want to remove the Addon Manager ?"
In your last post, you replied ONLY to question #2, but the most important one, to know what erroneous lines you must remove from your FSX.CFG, was the #1! Since I did not hear anything from you anymore, I assumed you either figured it out yourself, or were otherwise busy.