Help, accidentally removed folders

[SpaceBadger007]

I am such an idiot, I tried to download the css shuttle, and only a few parts came up so i decided to delete it, and when i went on game data i saw that the sub assembles folder was empty and a few other folders in the game data, and scene im an idiot, i deleted it, thinking it wont do any harm if it has nothing in it. How wrong was i, and now i cant use the vab or the sph. HELP PLEASE:(:(:(:(:(;.;;.;

[Gaarst]

First, go to KSP_win (assuming you're on Windows) > saves, and backup your save folder (folder with the name of your save).

Then, you'll have to do a clean install:

If you downloaded the game on the KSP website, just download it again, extract to a clean folder and put back your save folder. All of the deleted files will be back to normal.

If you got the game from Steam, go to your library, right click on the game and "delete local content". Then download the game again with Steam, paste your save folder and it will be back to nromal.