I unstalled 1.4, very easy. Then went to Adobes site and downloaded 1.3.1. Installed, opened and all my pic's were there. I did back them up to an external hardrive just in case but didn't even have to use it.
If I could do this anybody can !:D
I upgraded LR on my laptop while I was on a trip last week and noticed that it started acting very, very flaky, but I wasn't sure if it was the update or something else. When I got back home I noticed that my desktop did not report any new version as my laptop had--now it makes sense!