Updating Modded Install

[Bosun]

What's the proper way to update the game build on a modded install with a career save?  

I messed up somehow and had my saves scrambled, I think.  I downloaded the new build, and I had simply copied all the new KSP folders, except for the GameData folder, which I just replaced the "squad" subfolder in it, and left all the mod folders there.   Then I re-inserted the saved game files into the updated folder (I had moved them to desktop for the merge to make sure they didn't disappear.)   
 

What'd I miss?  Thanks for any help.  
-Bosun

[Gaarst]

Some (most) mods work with only one version of KSP. Typically, a lot of mods for 1.0.4 were broken with 1.0.5: you need to update the mods as well, you can't just copy the folders of the outdated mods.

The best thing to do is a completely clean reinstall, then reinstall the correct version of each of your mods and place the backup of your saves in your new folder.

[Guest]

^^ What he said.