RegionFour does not allow you to return to the home menu, for some odd reason. The 3DS crashes as a result of pressing the home menu button. However, the only games I've tried that actually allowed me to return to the home menu are Pokemon X, Pokemon Y, Pokemon Alpha Sapphire, and Pokemon Omega Ruby. I don't know why though, maybe it's because they have an actual game icon when inserted into the console unlike other import games? I tested this using American copies of the games on a Japanese New 3DS with the RegionFour exploit on a digital copy of Cubic Ninja, if that helps.