I was running out of space on my C drive and was trying to get creative in saving space. Soooo, I moved the Aerosoft folder ( which has A319,318,320, 330, CRJ Pro) from C drive to the D drive on my HP (D drive had over 916GB free, compared to C which had only 9gb free). I started up P3d v4.5 and no aircraft showed up, so I cut and paste back to the original location (C/Documents), restarted P3d 4.5 and it still didn't show. This was stupid on my part, so I need help in trying to fix it the less painful way possible. Thanks for your help..