After tinkering with this for a bit, I found that if I go to the MyFiles icon and click on the book cover, it causes the hang/crash. However, if I click the dropdown arrow next to the book, select "View Details" and then click "Read Now" it works.
Obviously, not ideal, but at least I can get it to work.
On to another question: Is it me, or does the application not really honor your view settings? Seems like I can tweak the font size and margins, but it doesn't appear to honor justification or font selection (or at least it's not consistent).