Not really a good solution, but other than duplicating the pages & cropping them down to 11x17, if you can get the first 11x17 chunk on the screen, then go to File, Print, and under Page Range, choose "Current View". This will print just what you currently see on the screen. If you can line up the first half using the Zoom function, you might be able to do this without having to go the cropping route.
If it works let me know (and consider liking my answer); otherwise, you can always reach out to support and see if they have any suggestions: https://www.gonitro.com/support/ticket