Hello and welcome to Mameaddicts, I am not very experienced with this as I have had the same MAME for quite sometime without updating unless something major happens, which has not yet.
Anyways, you'll probably need MAMEclrpro to update.
Examples of this would be the M2 Emulator or Finalburn Alpha.
Once you have downloaded a dat file you'll need to set it up.
My understanding is that you will need to find a MAME update set (newer roms) for the version you are trying to update too.
CRLMAMEPRO is a long, drawn out joke if you don't really care about dat files or any of that other bullshit. Once it's done, it will begin to download what has been changed or added.You can view all forums, all pics, all member profiles, everything.If you're just here to lurk, feel free continuing to do so...there is no reason to sign up for an account.Once logged in, it aligns everything to the left(as it should be).If you're already a member..in: Ok, so you've downloaded the 16GB set of roms, but what do you do when the next set comes out? Then grab the torrent for the FULL set of roms you want to update to(example: I have the .126 set currently, I want to update to the .127 set), have u Torrent aim the download at your current "roms" folder in your MAME program folder(or where ever you place your roms).Basically, Im starting to look for roms but Im having a hard time understanding how they are maintained and updated.(and please let me know if I'm completely confused here) MAME always strives to support the most clean an accurate set of ROMS as possible. There are no descriptions available for MAME 0.149 to 0.150 Update Pack in our database.You can help us out by submitting a description for this title.The Rebuilder The rebuilder is an advanced way to re-create rom files and find missing rom files without having to download them.It does it by using the CRC32 checksums which are unique to each rom rather than using the rom name which can be very different from file to file.