I have the same question and no Umberto...I don't consider a program completely uninstalled when there are still lots of files and folders left on your disk.
Make an exact list of this "lots files and folders", so we can discuss if they really had to be removed or not or, if they were files shared by other products, that shouldn't be removed, or so you can be explained why they weren't removed.
I guess I could just delete all that stuff manually myself but you should consider making an uninstallation program that really does what it should...remove the product you wish to uninstall.
The uninstaller DOES what is should, it removes the product. Removing a product means preventing it to run and not having it loaded anymore.
The uninstaller ALSO have an OPTION, that ASK "Do you want to remove the Addon Manager ?" and "Do you want to remove the Couatl script engine ?", this will remove every "file and folder" under the FSX\fsdreamteam\Couatl folders, regardless if it might have been needed by other FSDT product or not.
The uninstaller does do this automatically because, obviously, people would complain that, after uninstalling GSX, KLAX didn't worked anymore...you need to understand all our products are sharing a lot of files between them, which is of course much efficient. For example, we only have only 1 set of Docking systems, which is shared by all sceneries.
And, uninstallers usually NEVER remove user settings (for example, anything in the %APPDATA% folder) this is normal.
And, uninstaller can't obviously remove something they don't know, because it was installed by something else. You need to understand how an uninstaller works: it's a list of files that will be removed, that is compiled at INSTALL time.
This means, if other files were added by other means ( in the GSX case, this might be Live Updates ) the uninstaller doesn't know about their existence, and wil not remove them either.
This is standard with ANY program that is installed using standard installers, it happens EVERYTIME, even with product costing thousands of dollars, like the Adobe Suite: their uninstaller also leaves "lots of files and folders", either because they are user settings, which no uninstaller usually removes OR because new files were added after applying Live Updates, which is why they have an "Adobe Cleaner tool"
http://www.adobe.com/support/contact/cscleanertool.htmlWhat would be the need for a "Cleaner Tool", if the normal uninstaller worked as you are expecting an uninstaller would ? Can't Adobe create a "proper" uninstaller that would fullfill your expectations ? The reasons why a separate cleaner tool, which need to be constantly updated too, is exactly because using normal uninstaller methods, the only files that are removed, are those that are known to the *installer* which was used at *install* time, because it's the installer itself that creates a list of files to be uninstalled.