Awesome work Antropus! Love the tool, works at lightspeed!
Problem though...I would like to filter down an old 0.78 mame version, but seems to freeze when I select the older .78 version and then trying to filter.
It does create the listxml, but when I hit the filter button, the app just locks up. I suspect this is due xml format differences?
It seems MAME also changed rom filenames through the years as well...so my filtering might be off when using .174 listxml with filtering on rom folder full of .78 roms.