On Ubuntu 18.04. Dropbox has been purged and *re-installed* because I want to put the Dropbox folder to an external drive. ( I have read the documentation and I understand the issues. I will work with those.)
The instructions on this site say that to change the target directory, I must click on the dropbox icon and follow the trail from there. But there is no icon anywhere on my Ubuntu MATE desktop.
Okay, never mind. In the ~/.dropbox configuration directory, there is a file info.json with an attrribute for path. I changed that to the directory I want to use, started Dropbox and was told that the directory was not the directory I originally used so Dropbox was going to fix that for me and hey presto it did just that.
So -- how do I point Dropbox to where I want it to go?