TGood

Hey, I need help! I got a virus on 9/20 and with that I lost the ability to run malwarebytes. It keeps saysing I missing some thing? I've tried to remove from add and remove and it won't let me. I've went and tried to delete files, so that I could just reinstall it. I purchased it so I have ID and Key but I can't find any where that I can go to reinstall with out buying it again. I know it can't be this hard. Can someone please help.