Well, I tried installing 2014.2.1 but I still get the Welcome Screen crash. Given all the crash fixes in that update I had high hopes but no joy. This time when I tried to roll back my choices were CS6 and CC. However, after installing CC I checked again and now CC (2014) was an option. So I installed that and I am at least back to where I started. Interestingly, neither CC or 2014.0 present a Welcome Screen when loading for the first time after installation.
What I would really like is a link to 2014.1 which worked fine before my troubles started.
Any help would be appreciated.
What does the detailed crash report say?