It looks like I got completely confused by some files which were already partly corrupted. I rechecked the files and corrected the already wrong codings, now it seems that they work fine in PSPad when format OEM is selected. Sorry for the mess I created here.
Thank you for your good work! -- <https://forum.pspad.com/read.php?2,71145,71165> PSPad freeware editor https://www.pspad.com
