Looks and sounds now amazing... Could you make the image resolution dynamic or configurable, so it would also be fullscreen on a rg350m? On that device currently only 1 quarter of the screen is being used, I assume due to the difference in size between rg350 and rg350m ...
I have the RG350M and have a similar issue. If I run a game straight from the emulator it fits the screen fine, but if I launch a game from SimpleMenu, it displays in the bottom-left corner of the screen. However if I exit SimpleMenu, run a game from the emulator, then go back into SimpleMenu, they launch fine after that - until I shut down again, then the problem comes back.