I've been noticing for some time that the program deletes songs without notifying me, nor does it send them to the Windows trash.

Could you update the program to prevent it from permanently deleting the songs?

There are some songs that are no longer on Customsforge and can no longer be downloaded.

4 hours ago, gafotas said:

I've been noticing for some time that the program deletes songs without notifying me, nor does it send them to the Windows trash.

Could you update the program to prevent it from permanently deleting the songs?

There are some songs that are no longer on Customsforge and can no longer be downloaded.

It automatically moves problematic files to either

Documents\CFSM\Duplicates
Documents\CFSM\Quarantine

instead of deleting them, so you should be able to recover them if you need to.