@StewDapples
My advise is not to mix mame and fbneo roms just keep them in separate folders.
Otherwise you can't keep track of which is which.
About new roms and emulator releases.
I would not spend hours and hours finding which rom still works and which needs updating if not necessary.
I would just backup all and get all new ones and filter them again which is much faster.
For lr-fbneo this would be easy as I explained.
For lr-mame2003plus I don't know.
I could be wrong but for lr-mame2003plus I don't expect many updates.
I never used CLRmamepro so I can't help you with that.