Imatch now stores the original file name when renaming. If you ever renamed a file by mistake you can restore
the original name with this renamer preset. In a text and variables block put:
{File.MD.XMP::xmpMM\PreservedFileName\PreservedFileName\0|replace:.{File.Ext}==}
(https://www.photools.com/community/index.php?action=dlattach;topic=8724.0;attach=20944)
Thanks for sharing!
Tip: If you accidentally rename file in the normal way (without the Renamer) you can just do an Edit > Undo to rename it back.