After years of worry free with AS I have a problem

Merged the session to a new database (as previous died, not much of a worry)

Success, now I can select folders, but nothing else for restore
Each folder shows empty
Yet when restored all the files are there

So it means that it does NOT display files

is that anything to do with an error I get in other parts of the Manager

"You can ONLY see 30 000 files per session"

So how do I restore a single file from the session that has 321 000 files
written to?