Just ran into this last night. not sure if there's a good workaround:
At work I run Octave on a laptop with a docking station and a 2-screen setup. Working yesterday, I had the main Octave GUI on the main screen and the editor undocked over on the second monitor. closed octave, undocked the laptop, went home.
Opened up Octave later with just the laptop screen, and couldn't find or get to the editor window. I selected the Reset Default Window Layout option, and the editor reappeared as a Tab behind the command window. Undocking it again, it went back to the same unreachable off-screen position. Came back into work again this morning, undock the editor, grabbed it from the second screen and moved it back to the first one.
can avoid it now, but is this an issue with the Octave GUI or just unavoidable when shutting down/reopening with different monitor configurations?
Nick J.