For example, if I have a mod file for Minecraft v1.7.10 and a mod file for Minecraft v1.8 both together in the "mods" folder would I be able to play or will it crash? So, do I have to remove Minecraft v1.8 mod file and let Minecraft v1.7.10 mod file stay just so that I can play on Minecraft v1.7.10? Or, remove Minecraft v1.7.10 mod file and let Minecraft v1.8 mod file stay just so that I can play on Minecraft v1.8? Basically what I'm trying to ask is, is it possible to play modded Minecraft having different versions of mod files in the "mods" folder at the same time? I'm trying to get answers beforehand, so that I'll be prepared.