I ended up taking a different approach to this. I used a slicer called SuperSlicer (fork off the Prusa Slicer). I downloaded it, made a folder for the binaries, dlls, etc and placed it all at "C:\Program Files\Repetier-Host\SuperSlicer" on my windows machine. Then in Repetier-Host I added a new slicer using the "Manager" button in the slicer tab.
After that, clicking the "Configuration" button in the slicer tab brings up the SuperSlicer interface. Set up all your settings in there to use as the defaults then when you slice in Repetier-Host it will use those settings.
The setting I was after was called IRONING. It's located in the following place shown in the image below...