All you'd need to do in this case is to unlink your computer:
1) Right-click the Dropbox icon in the system tray, or menu bar, by the clock 2) Click on the gear icon in the Notifications panel and select 'Preferences' > 'Account' 3) Click the 'Unlink' button 4) Afterward, Dropbox will prompt you to re-register. You can link the account that you use on your mobile device at this point.
Note that the Dropbox folder itself is still there and as you'll be relinking to a different Dropbox account, the application will detect that another Dropbox folder already exists on the computer, and will give you two options: 'Choose Another Location' or 'Install'.
If you want your new Dropbox folder to be in a location different than your existing folder, click on 'Choose Another Location'.
If you want your new Dropbox folder to be in the same location as your existing one, click on 'Install'. This will rename the existing Dropbox folder to 'Dropbox (Old)' and will create a new Dropbox folder for the account you’re currently linking.
I hope this information helps and please let me know if you need anything else Camille; I'd be happy to assist.