im not sure what to do… this program has complete Fed my entire collection
What exactly has happened?
To be clear though, if you hit ‘save’ on a very large set of files, with settings that specified to remove or incorrectly change information/tag, it will be some work to fix the data again.
Restore your backup you have done before any modification?
See this thread for the full discussion. It appears that the OP tried to rename his files using only the first line of a four-line renaming script.