I just checked it and I wasn't able to simulate it. GroupUndo for editor is set when editor component is created and then when settings is changed.
Can you give me some example or maybe better check you PSPad.INI (e.g. in Notepad). There should be only one line containing: GroupUndo, in your case with zero value If you find more occurences, send me your PSPad.ini please -- <https://forum.pspad.com/read.php?4,77975,78017> PSPad freeware editor https://www.pspad.com
