Windows 7 64-bit.

I've been developing/testing with Sencha Designer 2, whatever the latest auto update was. This morning, none of my projects would open. I tried several things and eventually uninstalled and reinstalled Designer 2.

I still have the same problem. Ext Designer opens projects fine, but Sencha Designer hangs when I try to open any project.

I get the welcome page asking to choose a project, and I have tried all of my existing projects, ext js, and touch 2.0 and all attempts to open or create a project fail. The icon disappears from my application list at the bottom of the screen. Sencha designer can be found in my task list, but nothing displays.

I don't even know where to start. It's been working great for weeks, and I am not aware of anything having changed today.