I have an old MX-900 which I feel the same way about.
I was able to program multiple buttons for a new ROKU streaming device, however, I cannot get one particular, crucial button (SELECT) programmed to my liking. I am hoping a new database would contain the right codes. My remote comes with it's own editor software --> MX900 Editor Software.

QUESTIONS:
1) Is CCP compatible with the MX900?
2) can you advise where you picked up the updated editor software?

Any help is greatly appreciated.

Emmanuel H.