> double clicked on top of that window and got my stuff back.
That should indeed fix it. Taskman has a cool but confusing feature where if you double click on the area you drag it with it changes from 'full' mode to 'mini' mode. In minimode, as you found there are no menu bars or other obvious ways to return to full mode. That said, it is usefull when you want to have one of the specific graphs on the screen but tucked into a corner somewhere.
Bill