Be sure you apply the current Live Update, because it seems that Aerosoft changed the name of the airplane folder from "Aerosoft Airbus X A32***" to "Aerosoft Airbus A32***", dropping the "X" from the folder name at a certain stage, so that would result in the airplane not being recognized.
It's fixed now in the latest update, so GSX will recognize both name variants. This also applies to the "Wheelchocks as parking brakes" issue, that stop GSX from complaining when the paring brake is automatically disengaged when chocks are set.