I've updated the first post with version 0.96. The new "MAME 0.172 Extras" torrent is different then before so that all files are zipped instead of seperate extracted files.
So 0.96 handles both the old Extras versions and the new one(s). If a zip exists called, for example, pcb.zip, it will extract it first to your %TEMP% drive and then work from there. If the zip does not exist, it will look for a pcb folder with all the files extracted in it (as the old versions were).
EDIT: They pulled the previous 0.172 torrent and created a new one. This one has a different setup (no subfolders inside .zip files) so I'll have to make changes. Stay tuned.
I also plan to include the other medias (bosses.zip etc), so that will take a few minutes longer =)
tldr; Wait for version 0.97!