This is the ONLY short-coming that the software has that is severe enough that I cannot fully recommend the software to other makers. It's always "I DO really like the software, BUT be aware that you only get one infill pattern :/"
I'm almost embarrassed when people ask me if I would recommend the software and I have to tell them that I paid $150 for software that can't do what open-source freeware does.
As mentioned, many new infill patterns were added in the latest 3.0 release. They included grid, honeycomb, triangular, wiggle, and the old rectilinear. There is also a new option to print multiple infill angles on the same layer for extra strength. For example, this could print both a -45 and +45 infill pattern on the same layer. You can find these options on the Infill tab.