All set - I had to delete my old saved game.
Press "A" than u in the Mainmenu.. Than hold L+R+X+Y..
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Delete or rename Launcher.dat from the sd card and try again
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Also, most (all?) emulators are available as .3ds files which gateway can load. And possibly with higher performance since gateway has kernel mode exploits.
Wait - so I don't even need this homebrew app? oh boy....
How do I install retroarch using gateway? I went to the home page and saw the large stable file. I see two other smaller files too (cia and 3dsx). Is the CIA better than the .3ds version?
EDIT - Ok I figured it out. Not sure why CIA is so much better than .3ds...