Sorry can’t help on the post but I bet if you do a search on this site there may have been a post about that control. Maybe a generic Fanuc post would work.
As for the depth of cut, I too have wondered the same thing. You can do the calculation in the rough spacing box if you know how many steps you want or need, such as by imputing 1.552/11 using your example. Not sure anything is gained, your still making 12 total passes.
As you get into Surfcam more you’re going to find a lot of similar annoying things about the program. I attribute it to a lack of real everyday use by the Surfcam developers, no real system for feedback from users, and just plan laziness from the code writers.
I'd would go with 5.2, it’s more stable than 5.1 but still locks up now and then.