Hello,
Every time I try to create a new project or try to open an old one, I'm greeted by a black screen. Nothing in the content or catalog pane. The work around to this is to go to the projects tab in the upper left hand corner, click the open tab and then I can select any one of the projects visible in the "recent projects" drop down to open. The problem is, this only works to open my most recent projects - no luck trying to open older projects that are a few weeks older.
I have tried everything from uninstalling, clean uninstalling, to installing the new patch, 3.3.1.
I deleted Microsoft runtime x86 because a meeting with the ESRI support analyst mentioned it could be in conflict with Microsoft x64.

If you are aware of any work around please let me know!!