I accidently set in motion the renaming of a load of files with the same title. Is there a way of getting them back to their original name as it will take me ages to change each one as there are secveral hundred documents.
If you haven't done anything else, Edit > Undo should restore the original names.
(Opus Light only remembers the last operation for Undo. Opus Pro remembers more operations, but that won't help restore the files that have already been renamed.)