I don't know exactly how this extension works, but I can guess. When PSpad is closed into tray, the main window is hidden and can't be found by extension. It will be hard to handle. Do you use more PSPad instances? If not, disable it in the Program settings / system.
-- <http://forum.pspad.com/read.php?6,63591,63624> PSPad freeware editor http://www.pspad.com
