How to make metadata changes stick when having made the mistake of updating while Match was running?

I've painfully come to realize that much my tedious process to add composer to 4,000+ tracks where this was missing, was done while Match was running.

I have a Time Machine backup of the library that contains the changes, but if I restore this, Match insists on downloading the old metadata (which means deleting the composer data). Is there any way to force Match to update the cloud data based on this backup of the library file?

I really don't want to have to locate and add this data again...!