I'm having a similar issue but I haven't renamed anything at all. The game Toobin' doesn't seem to load whatsoever, just gives me a grey screen.
Viewing post in 3Dnes Grey-Screening when trying to load a ROM?
"Some games are not supported yet by 3DNes. It's just that."
Then I would suggest getting on that before doing anything else. People are going to want to play their favorite games with this software and if their favorite game isn't supported they're not going to want to play, regardless of quality.
"I repeat again 3dn files are not rom files. They are just 3d patch file for a specific game. You must open your own rom file to run your game."
Yeah. I know. I'm not a moron.
Sorry if i acted a little rude it's just because so many people misunderstand 3dn file as rom file. I have met so many similar situations like that and had to repeat the answer again and again. For your opinion about the emulation work and the 3dification one, which has a higher priority, i don't agree with it. Nes emulation is over done with hundred emulator. If you just want to play your favorite game, there are many options for you. People want to try 3DNes because it gives a new fresh 3d experience. That's which makes 3DNes different from other nes emulator. That's why i have to focus on the 3dification part first. When it reaches a mature state, i will come back to the emulation part then. If your favorite game is not yet supported by 3DNes then you can always come back later then.