Unlinking a Dropbox Account
Occasionally it may be necessary to unlink a Dropbox account, for example if you have created a new account you'd like to use from now on.
To unlink your Dropbox account go to the main iOS settings app, and select Floorplans. Switch the "Unlink Dropbox Account" switch to the ON position.
Re-open the Floorplans app, open the Cloud menu, and click on Enable to be taken to the Dropbox login screen.