Allow VPN *not* to be default gateway

[Floppy]

The ProtonVPN config sets the default gateway for the machine to be the VPN - this is a good default, but in my case I want to just route over the VPN in certain cases, and have my normal interface be the default. I can turn that off in the config file, but as the config file is downloaded automatically each time, it doesn't help. Would it be possible to add some sort of configuration option to turn off the default VPN routing?