If you double-klick the PSPadShell_unreg.bat file cannot release it, you can try "Unlocker". It's a small freeware, can unlock any files that is locked.
Unlocker Homepage: http://ccollomb.free.fr/unlocker/ -- <http://forum.pspad.com/read.php?2,29341,29366> PSPad freeware editor http://www.pspad.com
