RMG v0.4.5 is released. Rosalie's Mupen GUI is a free and open-source mupen64plus GUI written in C++. It offers a simple-to-use user interface.

RMG changelog:
Fix "Change" buttons in the transfer pak tab of the options dialog of RMG-Input not working since v0.4.2

Download: RMG v0.4.5
Source:Here