I installed a very large SSD main drive, then moved the DropBox files to that drive from a second drive. I then unpinned the incorrect "Dropbox" from the Quick access tree in the File Explorer on the top left. Then I repinned the new and correct Dropbox path to Quick access by dragging it into Quick access.
Unfortunately, either Windows or Dropbox keeps changing the path back to the old one that is not valid. Generally this change seems to happen after every reboot.
Does anyone have a solution to this annoyance? I use Quick access a lot, and count on the Dropbox paths in that list being correct.
There is one other item to add to this: I have two Dropbox accounts in Quick access. One is business and the other is personal. The business account path always works.