I think you mis-understand. I dont want to delete the folders, I want to uninstall syncthing. I have tens of thousands of errors trying to download the shared folder (so it fails), and want to start again with one one devices sharing (currently I have 80+ as I used introducer). So I want to get rid of every trace of syncthing, especially the list of devices. Deleting them one by one is very slow. I have been unable to find where syncthing keeps its config.