Or, hopefully someone will come along here, or on the Alibre Forums and assist you w/ Alibre — as noted, while I was modestly successful w/ it at first:
I was completely stopped on trying to use the spline tool due to a corrupt preferences file, which wasn’t pointed out to me on the Alibre Forums for the better part of a year.
Another option would be to source a V endmill or chamfering tool of the correct angle and model the cut at that angle in Carbide Create using a series of parallel lines w/ no offset contours set to the correct depths.