Please note there is still no support for the gif format. This is because of licensing issues. You can only change the icon and emulator groups that this belongs to. This can be manually reset. Any game associated with an emulator that has an alternate .exe specified can be permanently set to use it.
Emulators can now store what system the emulator emulates.
Note that you can also search the games currently listed. Support for RomCenter data files. Right-click functionality on the emulator list. Right-click functionality on the media viewer. You can now toggle the emulator list display on and off.