Pse Explain:

i) I make a simple piano bass & drums number with RTs & MSTs & Render it.
ii) I listen to it again the next day: Oh that's nice....Which RDs & MST's did I use?
iii) I re-open the SGU file to check. Nothing! All info has disappeared. PB&D Tracks have all gone vomit-Orange. The Mixer says "Stereo 32 bit" for all three tracks. The Plugins column says "None".

In short: All useful info about how I made the track has vanished. And I've just wasted ages failing to find a way to get it back.

It wasn't like this in the olden days...

Grateful for help. Many Thanks - Best - Andy