Rhino keeps crashing and now my drawings/layouts are missing text

My Rhino7 keeps crashing randomly - it asks me if I want to report the problem and send the files but they are all confidential.
I have just opened several files (some dating back before the crashing started) and they are missing huge chunks of text.
Any ideas or help greatly appreciated!

Files and crash reports sent to tech support are not shared outside of Development and Testing.
Files share in the forum are publically discoverable.

If you do not give us the specific details needed to repeat and understand the problem, we can not solve it.