Oh no, not again, one of the best features of KM hidden away
If I read you right, it's not just the position, but the complete toolbar vanished?
Just did a quick file search inside KM folder for name "&Privacy Bar", and looks like "
skin.js" is a likely culprit. But only the one in Klassic skin, right? Open that file in Notepad and DELETE the visibility line in it. Does it help?
After deletion in skin.js (which is part of a skin itself), KM should hopefully respect the user setting for toolbar visibility. Almost all user settings (which appear also in about:config) are stored inside prefs.js in profile folder. Am not sure why the hardcoded skin.js seems to override that user setting, if it does that looks like a bug to me. If anything, skin.js should only kick in directly after a skin switch, not at each browser start again. But am writing this only from theory, not tested on a newer KM version myself.