Michael:

Thanks.

You gave me enough information to figure out what was going on. It seems that there are two types of OpenType fonts: TTF and OTF. MoI only seems to work with TTF fonts at this time.

Unfortunately, the font that I was trying to use had an OTF extension and wasn't one that I could use in MoI.

I was able to find a very similar font online that had a TTF extension, which I am now able to load into MoI and use.

You might want to consider adding this information into the documentation (for other users that might run into the same issue).