I think it not yet fixed. Suffering from that problem again today (today's head). Sometimes when CB starts, the latest project is reloaded, but no project tree visible, just the opened files (which is empty in my case). Then for example I drag the CB screen so that the project pane is out of the screen, drag it back and I get immed. as in the screenshot at the top of this topic. I think there's a conflict between the "opened files" part and the workspace/project tree.