PT 11 and Midi Compatability

I have Pro Tools 11 and recently purchased an M-Audio Keystation 49, a USB powered Midi keyboard. My o/s is Windows 7. Thru many hours today I learned I needed either a folder in my Avid folder named VST - AAX or RTAS. I find neither of them. Two days ago I downloaded Melodyne Essentials and during track setup in PT, I can find that in the folder I'm supposed to find my Keystation. Last night I downloaded Native Instruments Kontakt 5 - Reaktor 5 and Guitar Rig 5 but cannot see them or utilize them during set up of my session.



A search of my computer doesn't show any of the files I've listed above. How can I get all this together. The thought of spending more money is driving me crazy!