Interstellar with existing save?

[MadDoctor5813]

I've started a new career save with mods, mostly inspired by Scott Manley's Interstellar Quest series, but I neglected to install Interstellar, as I feared for my RAM. I've installed it now, but its parts don't seem to be appearing. I recall a notice saying that I had to choose the Interstellar tech tree at new game start, but it's not in the thread now. Does this still apply, or can I keep going with my old save to the Interstellar tech?

[Fractal_UK]

When you load the save game for the first time you'll have the option to pick the Interstellar tree.

You will need to go to the R&D centre to unlock the party's before you can place them. If the parts are actually not appearing in the VAB though, chances are you've installed it in the wrong location.

[MadDoctor5813]

It turned out that there was a second subfolder inside my KSP install that actually contained the game. I re-extracted to the right place, and it all works now. Thanks for helping.