Cannot disable scan/update for Open Shell

[f14tomcat]

Since the release of Open Shell 190, I cannot set the left pane item Open Shell to disable scan. It will set in the current session, but will not retain the setting on close of PMPC. Next iteration of PMPC the left pane options have Enable Scan in green, yet the item "open Shell" is not crossed out.  These are contradictory. I need to stay on ver 180 and have to uncheck the item each time. 

Windows 11 22621.2070, PMPC ver 4.5.0.3

Thanks.