I was in my scene, everything going about normally, then when i tried to save my game using ctrl+s, the project crashed. I could not close out of it or go to desktop, so i decided to get on task manager and end the process. Once i ended it, i re-opened unity and there was another scene open! I tried and tried to get back on my scene, but every time i tried to open it, absolutely nothing would happen!
Many script commands are changed, you should check the new script manual and fix your old code