I'm still experimenting myself, but I would still use a beveler. The creaser is, as far as I know, used to "iron" the edge, to make it smooth. You can also use it to melt wax into the edge. I don't know where your machine starts, temperaturewise, but I'd start with the lowest setting and when on the edge, keep moving it to avoid burning it or an uneven colour. If it is designed for creasing leather, the temperature range is presumably chosen accordingly. There are tips that are concave for rounded edges and flat ones. I'm still figuring things out myself, I'm sure there are others, that know a lot more about it.
Have fun with your new toy!
Christoph