I reinstalled P3d V3.2, scenery and content as well I get couatl manager in the P3d menu but nothing when I press Ctrl +F12
It's not very clear what your problem is. Do you either have:
1) All the Couatl and GSX menu entries visible under the "Addons" menu, so the program appears to be running, but you don't see the menu ?
OR
2) You don't even have the the GSX menu under "Addons", which means the program hasn't even started, so your problem doesn't have anything to do with not installing the "Content".
My reply was to the original poster, which clearly said he HAD the GSX and Couatl menu, so in his case, the problem was surely the missing "Content". You said "I have the same problem", but it's not really sure you have the *same* problem, if you don't say (like the OP said) if you are seeing the GSX menu under the "Addons" menu.