Get the new version from
www.mamedev.orgIf you aren't used to the official command line version of MAME and are used to using some MAME derivative like MAME32 or MAMEUI, download MAMEUI from here:
http://www.mameui.info/ (64-bit only)
Only roms that were changed would need to be updated.
The changes are usually just renaming or reorganizing files.
The affected rom will not work because the newer version of MAME will be looking for the files under the wrong name or in the wrong place.
See the what's new file for each version between yours and the new one.
http://www.mamedev.org/oldrel.html....or just wait until a game you want to play doesn't work and then look it up.
If you want to dive into the world of keeping your romset updated without having to check the whatsnew, do a search online for clrmamepro
I've done it in the past, but anymore I just don't update until there's a big reason to. At that point I just get a new romset from scratch.
My cab is still on v.146
I probably won't update it until I build a new computer for it several years from now.
Since this game used a hard drive, you will need the CHD image in addition to any roms.