If you cannot establish a connection to the Dropbox or any other cloud service from the app's Database Manager, you will probably receive an error message that something went wrong and you should try to log in again.
This problem may occur due to the fact that you have connected to the cloud before but never really logged out properly. Therefore, please tapin the top right-hand corner to log out correctly.
Afterwards, you should be able to reconnect to the cloud. Just go back to the Database Manager and select the desired cloud. You should see the following screen next:
Note: If you have already connected to the cloud, opened a database and now go back to the start screen, you can also open another database if you want. However, please note that you are still signed into the cloud. If you want to log out, then please tap “Open DB Manager” and select the desired cloud service. Tap in the top right-hand corner afterwards and then select “Disconnect”. This way you can logout properly.