wmh2c

Probably a stupid question but I went to KSP's Previous Stable Release Page because I too am having problems. I just bought the game with Steam not long before this update so I don't know steam or kerbal very well. Where do I find the "Steam Game Settings" for Kerbal? Is it in game? Is it in Steam? Is it on my computer somewhere in a file? Any help would be beneficial. I just want to build my rockets again and get back in space. I tried the new one and it doesn't let me build a rocket because it stops responding to my build and makes me exit by a hard reboot (it doesn't freeze per say but won't let me build or exit just sits there and allows me to move around inside the VAB). Thanks in advance for any help.