i'm working on an rom hack of new super mario bros. today i wanted to see if the custom world map icons worked but when i start up the NSMBDS editor and then open the rom file of new super mario bros it says something with an overflow and sometimes it says that i don't have acces to the rom files because it's used in an different process. also when i load the rom files in an emulator (DeSmuMe) it also just closes the emulator. i think that the rom files are broken and that i need to re-install it. but i'm worried that i lose basically everything in my rom hack