unneeded masks are used to ignore specific files which are usually marked as unneeded. Normal behaviour is if they are not listed in the dat, they are listed as unneeded then. With unneeded masks you can force cmpro to ignore such found files.
So they are not used to ignore roms which are listed in the dat.

If you want to enable/disable sets, use e.g. regular expressions in 'set information' "select sets" edit boxes.


Roman Scherzer