I moved the Flightsim Studio E-175 back into the Community folder from the other hard drive and tried to select it in FS2020. When I selected it, got the following: ‘ACTIVATION FAILED - Check product installation’. Tried reinstalling this plane, with same result. Sent a message to the FSS forum. Then moved the Cessna Chancellor 414 back into the Community folder, and it appears to be working OK. So some planes cannot be moved back into the Community folder? Will try some other planes. Also I have a lot of scenery files to move back into the Community folder and try.