select+start doesnt work. I've already tried to map those keys and i had to reset the dingoo (couldnt access the menu).
It would also conflict with the gameboy's reset feature (select+start+b+a)
Don't know why it doesn't start automatically, don't know how the Dingoo launcher system works.
Anyway, you might want to know that you can load zipped roms from the ohboy menu (couldnt be possible without the menu, as ZIP files are automatically launched by the CPS1 emulator.
Anyway, it's still better than launching the explorer and browsing to launch an APP file.
Note: each time it is launched, SIM version will suppose that the folder of the rom which launched ohboy is the rom folder. It is intended behaviour, because some people have separate rom folders for GB and GBC roms. So when you launch it from GBC folder, the default rom folder will be GBC, and when you launch it from GB folder, the default rom folder will be GB. You can still browse to any folder, or launch it from a rom folder located in the SD card.