I would like to perform a fresh installation of the Swarm Desktop app.
I tried deleting the folder located at /Users/username/Library/Application Support/Swarm Desktop/ and Swarm Desktop App from the Applications folder (MacOS) but the RPC URL remained the same after reinstalling the app.
After deleting files from folder location you should also delete local storage in the browser. Go to dev console, select Application tab and delete the key json-rpc-prodiver in Local storage.