2 questions:

1. I can't learn IR codes from the other remotes.
I press [Main Menu][Tune Up][Learn new commands from any remote control][Next]
And get screen titled "Missing commands" where i cant learn codes. If i press [Next], prowizard jumps to main menu again.

2. After first configuration finished, i can't change model of Device.

I purchased this remote for tests as new product. And find out that MX-810 software most terrible for installators. It's great mistake of URC.

Eureka!
I find, if i want learn button - i MUST mark it as BAD!

I miss for normal software.
This MX-810 is last MX-810, that i purchased.

Addendum:
- I can't create, open new cfg without close application.
- I can't load config from MX-810.

IMHO
MX-810 ProWizard is example of very crude, non user-friendly programming.

While there are lots of things that annoy me about the 810 software, I actually like the way it learns commands. The ability to queue up all the commands for a device you want to learn is way better than they way it works with MX-Editor.

OTOH, your addendum is bang on.