Its a little bit painful, I think you should still be able to load the planets from old type files in planet studio however. What you need to do is load all the bodies from FSS in the planet studio and click Save Planet. This will write them into your UserData/CelestialDatabase/CelestialBodies file.
Once you've done that, clone the default system in planet studio and locate the system file in UserData/CelestialDatabase/PlanetarySystems. You can then re-write the file paths so you're referencing the UserData planets. Finally, put in the old <Orbit/> lines and parent details in their proper places within the system file.
The holy grail of planet editing now is: Never, EVER change anything in GameData. Once you upload your system, the game will download all the files into ppl's game data but until then you need to be saving stuff from planet studio into User Data.
Its a little bit painful, I think you should still be able to load the planets from old type files in planet studio however. What you need to do is load all the bodies from FSS in the planet studio and click Save Planet. This will write them into your UserData/CelestialDatabase/CelestialBodies file.
Once you've done that, clone the default system in planet studio and locate the system file in UserData/CelestialDatabase/PlanetarySystems. You can then re-write the file paths so you're referencing the UserData planets. Finally, put in the old <Orbit/> lines and parent details in their proper places within the system file.
The holy grail of planet editing now is: Never, EVER change anything in GameData. Once you upload your system, the game will download all the files into ppl's game data but until then you need to be saving stuff from planet studio into User Data.