Sorry to hear of your current trouble. My guess is that somehow the project file has become corrupted. Anyone using any DAW long enough will have a hassle like this at some point, one reason I always click SAVE often and also make a completely separate copy of any serious project I’m working, whether for others or myself. Personally, I find it rare in my use of Podium; other DAWs I’ve used, such as earlier version of Cubase, did it routinely and was an almost daily frustration.
I hope you keep this file in question. While any several of us here could inspect it for you, it will be best if Zynewave analyses it for you. You could PM it to Frits or contact Zynewave directly via mail. There will certainly be great interest in examining it.
Or, you could just sit tight and work on something else for the time being, as Frits follows all posts and should contact you shortly.
Good luck! Cheers!
–Tele