You surely haven't the last update installed, since that TUG has been added very recently so, run an update CHECK now.
If that still doesn't work, check if both GSX packages in the Community folder are Symbolic links and NOT real folders. If they have a small arrow in the Explorer file view, they are Symbolic links as they should be but, if one (or both) don't have it, they are real folders, and this is wrong and not how we install GSX.
It is possible to invertedly change the folders from links to real folder when doing a backup/restore of the Community folder so, if this is the case, REMOVE both folders, then start the FSDT Installer and select RELINK.