This happened when I upgraded from Studio Pro 4 to 4.5, all of my Ampire XT Classic settings and amps disappeared, fortunately in Studio Pro 4.5 you could go to Studio One in the menu bar and then Studio One Installations, Legacy and Compatibility and you could find Ampire XT Classics there you just needed to check and install it. Unfortunately I just upgraded to Studio One 5 and the same problem only this time Ampire XT Classics is no longer under Legacy and Compatibility, I cant find it anywhere. Is there any way to get it back?