Hi Matt. Thanks for these ideas.
It's a pity the undo function didn't work after I deleted the genre.
I have been doing a lot of library maintenance and the latest backup is 2 weeks old.
Also I have removed a lot of unwanted files from the library it would take a lot of work to identify and remove them manually.
I've been trying to figure out how to get a list of the files from the current library and backup library into Excel so I can compare them.
This should identify the missing files and I can manually restore them.
Any ideas on this?