Jackoall

I have finally figured out how to add on mods to KSP, however I find myself perplexed I downloaded SCANsat and installed it I got the parts and there are a few bugs in my game, I deleted the SCANsat files and everything was okay, but I would like to know where to get a fully working SCANsat from. The bugs included the parts not unlocking in normal menu but where okay in sub assembly menu, couldn't preform science even clicking on things such as mystery goo or capsule, and one of the maps stayed open even though I hit the "x"

I have tried multiple times to download and add mods to ksp I have used YouTube to figure it out as well and done it the way it said but it either doesn't show up in game or if it does it doesn't work right, please help I would at least like to start with simple ones like mechjeb and scansat