How to completely reset Dropbox

I'm posting this for others in my situation for see. For a few months I've had syncing issues because dropbox was trying to sync files on a mounted drive (that i'd "placed" in my dropbox) that I was no longer using. I had a few thousand unsynced files constantly, but the real issue was that my dropbox was now only irregularly syncing other files, which became a big headache due to having several shared folders. I tried a lot of things, like re-instaling, deleting cache, re-naming folders, deleting folders (both locally and on the website), and nothing worked. In the end, what worked was to do an "advanced reinstall", which includes an uninstall, some commands in the terminal, and a comprehensive install. It's described here: https://help.dropbox.com/installs/advanced-reinstall

This is what fixed it for me, perhaps along with deleting and renaming other folders that had syncing issues.