Right edge is vertical line, in default on the position 80 WordWrap can be done with this line or with window width, so your option has no influence of default wraping.
PSPad should remember (if has access to write into PSPad.ini) if last document was wrapped and should use WordWrap next time you run it. There can be problem with file size, because there is a limit for automatical wordwrap. You can increase it in the program settings / Direct edit button MaxWrapSize=200000 (in bytes) Change it e.g. to 1 million -- <https://forum.pspad.com/read.php?2,76886,76887> PSPad freeware editor https://www.pspad.com
