Now I opened my FSX, it said couatl update something, so I let it do it.
You could have dismissed the update. The issue is, GSX has now replaced the ParkMe features that was integrated in the sceneries so, if you have the sceneries installed and do the Live update, it will restore GSX, since there's no reason why (being free) one could possibly want to keep the sceneries installed without GSX.
If the reason you uninstalled GSX was just because your sceneries stopped to work, that's not obviously a GSX problem but, something else in your system (antivirus, missing libraries, etc) that prevented the updated Addon Manager/Couatl to run so, removing GSX wouldn't fix that, because if you reinstall the sceneries, they will still download exactly the same version of the Addon Manager/Couatl programs that come with GSX so, the solution shouldn't be uninstalling GSX, but fixing your problem.
A solution to disable GSX and still be able to get updates, is:
- Open the file at %APPDATA%\VIRTUALI\Couatladdons.ini with Notepad
look the section [gsx], there should be several parameters related to timings like refueling time, etc. after the last one, add the following:
Disable=1
And save the modified file back.