Well, since there *is* no preferences panel, the bug isn't that it's greyed out. The bug is that there's a menu option for it. Removing it for next release. The main window is all there is. Sometimes it is hidden behind other windows (try minimizing/hiding other applications). Also, top right menulet may let you hide/show the main window. As to why it's not working for you in general for pyTivo. I don't really know. Since there's nothing interesting in the logs, and nothing more than 'it used to work for me but now it doesn't', it's really hard to debug.