Hi. I downloaded the iso of a gamecub game, I managed to launch it and play it with an emulator, everything went well until I changed the default launcher in adobe reader by mistake. I later put them in winrar to see if it will recover as before but no. The file iso is launched with winrar and become a Winrar file while retaining its ".iso". it marks me "the archive is damaged or its format is unknown" I do not know what to do.I reinstalled but the default program was changed so is always open with winrar.i tried to convert using software but the software tells me that it is not possible to convert because it is already in .iso.the problem lies in the default launcher.I ask your help