Adding, removing and reordering countries

[Marshall]

Indeed, a facility that gordon-creAtive requested was an option for Launch Base to detect and install/uninstall the required version of the RockPatch when a user launches a mod.

Launch Base and the latest version of RP-Gen (which I sent pd recently) will also allow the RP to specify how far backwards-compatible a version of RP2 is to previous versions, in case a version of RP2 does break compatibility.

I think the easiest thing would be for pd not to worry about breaking compatibility - any mod author releasing an RP2 mod should be keeping an eye on developments and updating as neccessary, something which Launch Base can help with.
And if a mod author releases an RP2 mod and then stops updating, the users will be expected to use an earlier version of RP2. As long as there are enough legacy versions of RP2 kept available to cover backwards-compatibility then there's no problem.