How to get the sync link to dropbox again?

hello all,
I'm using Joplin 2.1.9 (prod, win32) and I'm new.
I set up the synchronization to drop box by opening the long link and copy-pasting the long code back to Joplin. Then I noticed that I used a wrong account in dropbox. So I logged into the correct drop box and tried to re-do the procedure, but I cannot get the long link anywhere. Now, once I click the Synchronize button, Joplin sent and fetch data to that wrong dropbox account.
I uninstalled and re-installed my Joplin, but it still links to the wrong dropbox account.

How can I get the link and set my Joplin to the correct dropbox account?

Thanks

Please ignore. I got the answer. Thanks

Well why don't you provide the answer, then, for anyone else who happens by?