ps. The 0e files provided in the "Digital Pack" zip download opened fine.
Thanks for letting me know! It's an odd issue as I've only had it reported once prior over the thousands of downloads (and last time I was able to get the compatibility figured out and updated). I'll see if I'm able to work out why it isn't displaying for you, but Acrobat Reader may work universally better for the PDFs in the meantime.