So ive started a unity tutorial and I exited the engine, when i reopen my project, nothing in the editor is there anymore - yes I saved it I know how that works - But I mean all my assets and materials and controllers still are in my folders and in the editor itself, but nothing is actually on the plane, and the plane doesnt exist anymore either.. Am I doing something wrong? after I was done working I just hit 'save' under the project that I named it, and when reopened I always get nothing in the scene, but folders and stuff are still there. This has happened numerous times also - thankfully nothing but a plane and a few boxes were lost..