ApexSQL Model - Index was outside the bounds of the array

I'm trying to create a model from a SQL2008R2 DB that I will be migrating up to 2017 soon.  When I try to create a model from that, or any other DB on a SQL2008R2, ApexSQL Model briefly starts the import and then throws the error:  Index was outside the bounds of the array.  

I just downloaded Model from the Quest site, but the version of the UI indicates v1.0.0.

Any ideas to help me resolve this issue?