Word Press 4.1 Messed up my pages

Hello,

I updated to 4.1 and now I cannot add any new content to already established pages unless I have it in HTML mode, which will not work for me.

I looked at some other posts and already tried deactivating all the plugins, and reverting to a default theme (2010). Neither worked. In a complete panic I went top my backups (luckily I just set up backups before the upgrade) and restored the site to before I updated it. This fixed the theme, which changing had altered everything, but still I could not add any additional words or images to any existing pages. I tried making new pages and pasting the content from the HTML window in it, which created an identical page, but it did not fix the problem, and I still see NOTHING in any page I try to edit when in the “Visual” mode. My Updates Page under Home says that I am still running 4.1, even though I restored the old version of the site. It seems like a lot of people are having a bad time with 4.1 and I would really like to either have someone walk me through this, I am past what I understand, or I will need to get rid of 4.1 and go back to 4.0. As of now I have a lot of people needing me to do this, so I quick reply is much much appreciated.