You don't have to rename the emu to match the old ones but you can't have 2 emu (.sim extension) for the same hardware.
So make a backup of the old stuff (just in case) and replace with the new ones (for example, replace nes.sim with dingoones.sim)
Last step which is mandatory, update the jukebox (automatically performed when connecting and removing the dingoo to a PC) so that your games (for example .nes extension) are binded to the updated emulators.