If you see the "Couatl powered plugins" menu, but not the "XPOI settings" menu, it means the software is working and the Couatl engine is working so, there's no need to check the EXE.XML because, if there was a problem with it, you wouldn't see any menu at all.
So, if you are missing only the XPOI menu, it means XPOI is not installed. You must have made some kind of mistake when uninstalling.
Try to do the following, only the following, and don't do anything else:
- Uninstall XPOI and reply YES to the question of removing the Addon Manager, and reply YES to the question about removing the Couatl engine.
- Go to the FSX\fsdreamteam\Couatl folder, and check the XPOI folder has been removed. If not, remove it manually.
- Reinstall XPOI, and check if you see both menus, and XPOI of course.
If you still don't see them, check if you have a Couatl.err file in the following folder:
%APPDATA%\virtuali
and see if there are any error messages inside.