So earlier today I went into the minecraft launch options and I changed to an older release date for a mod I was downloading. I had already had forge for the 1.12.2 version of minecraft. I had all the mods I wanted for it and it was working perfectly fine. Once I was done and ready to use those other mods, I changed the version back to 1.12.2, but I noticed that the forge was gone. So I went into my folders and I put the newest version of forge in there, but when I opened minecraft it didn't have the little mods icon in the menu. I even put everything back the way it was, deleted the older version of forge and everything else I downloaded, but it still won't work. I'm not sure if I explained this the right way but if anyone dose understand any help would be much appreciated, thanks!