Please note i am BY NO MEANS a pro or anything, but i will try to hellp if i can.
It seems as if this new WP 3.3.1 has a lot of conflicts with a lot of plugins and themes. CF7 included.
I use the "Ubergeist" theme and as soon as i upgraded WP to the new 3.3.1 all hell broke lose. Especially with the CF7 plug in. for any of you using any themes, try checking for new updates of your theme for 3.3.1 WP. This solved my problem immediately. For some reason, something with the new WP, my Ubergest theme and CF7 didnt agree with each other.
If you overwrite any of your CF7 plug ins with newer or older versions, it *SHOULD NOT* lose any of your forms you have saved. I tried this myself when i was trying to troubleshoot my problems and i didnt lose anything. However, please do so at your own risk.
I think the biggest thing is to see if your WP Theme has any new updates. This is pramount.
The 2010 theme i have a feeling may not work too well with plugins and the new WP 3.3.1. This is just a guess of mine though.