FBA-XXX Pro is primarily intended for ROM collectors and users;
who are more serious about emulation than the casual gamer.

The required ROMs are newer and more accurate dumps than those
supported by FBA-XXX, and many new parent, clone, and bootleg sets
have been added. However, these ROMs can also be more difficult to
acquire and will require updating as newer dumps become available.;

For this reason, if you are a casual user and your only interest
is in playing the games, it is recommended that you use FBA-XXX.