Have you updated anything else besides the theme? The symptoms you mentioned like the visual editor not displaying correctly and widgets being frozen are usually brought by updating WordPress or various plugins.
Since part of the Option page is showing(general), a simple hard refresh on the browser may be the solution (CTRL + F5). This will clear old files stored on the browser. You can also try to view the visual editor on another browser.
Another thing you could try is to temporarily change back to the default theme(twentyeleven/twentytwelve) then change back.
Also, thanks a lot for the donations. I really appreciate it.