An uninstalled plugin still appears in the Photo>Edit In> menu. I've done a file-name search and the plugin files are gone as intended. How do I clear them from my menu?
In Preferences > External Editing > Additional External Editor, in the Preset pulldown menu, select the plugin. Then click on the pulldown menu again, and select Delete Preset.
That took care of it, almost. I just noticed that at the top of the pull down menu there is also a separate section that reads "Edit In blah-blah-blah.exe... Ctl+Alt+E" .
Nonetheless, the main section just below that has been cleaned up successfully.