I cannot figure out how to get Evernote Clipper for Safari to save its login information - somehow Cookies is wiping it. Any ideas appreciated. Thanks.
you should just need to check the preference:
Always treat Browser Extensions as favorites
Browser Extensions all tend to dave their data as "Databases"
and checking that preferences in the "Preferences" tab, will preserve all Extension data.
clipper.safari.evernot.com is the associated Database.