"Are you saying you don't have anything else in the Addon Manager window, other than GSX, no other products ? Or, are you saying the other FSDT sceneries (not GSX) are indicated as "Not Installed in the Scenery Library" ?
In reference to your question above. The airports under fsdreamteam are visible in the two windows, publisher and product windows listing in the Add-on Manager. But the option buttons below are all subdued and unavailable except the fallowing; Backup RegKey, Web Site, De-Activate. These are my only option for the airports I have purchased which are Chicago Ohare, JFKV2, KLAS, KLAXv2. All show ACTIVE but not installed in the Scenery Library. I can not pick the "Reinstall" option tab either. Should I attempt to De-Activate them all and re-activate or re-install?