I have already tried that, and it did not work.
The strangest thing is that when the ED creates a save name for "YS III.smc" it gives it a weird name like "YS III.smc." with extra dots on the file name, and when I load the SD card into a PC I cannot delete or edit that save file, it is like it has curropted the FAT file system.
Only way to get rid of the file is to format the SD card and copy the roms back on. But then starting the game will produce a similar curropted save file.
Does removing the battery erase save games from the SRAM? If not, is there a way to erase the SRAM completely?
Save game function for Super Mario World seems to be working fine strangely enough.