Lost folders with lots of info I want and need after latest "update"

After this last "update" that went backwards in usefulness I can not find folders that I had with a lot of info I want and need, both business and personal. IF this can not be fixed do you have a recommendation for a better free email client system? I have lost needed information. Your how to find what version I'm using is garbage, try to either make the instructions complete with a step by step for what option to go to or make it an auto fill when coming to this page. I had to guess. Thank You Mike Gert [redacted]@gmail.com