OK. I went to the Editor and I have the navigator list on the left, the button editor on the right, the Simulation in the center and the macro list on the bottom.

Since the file has an extension of .mpx, and not .rcc, there does not seem to be any way to import the file.

You suggest using the Unversal Browser (panel on the left), but how do you navigate to the .mpx file where the codes are located. You suggest I drop and drag one of the commands, but from where to where?