Error Selecting Table

I downloaded version 1.0.195.1950 and tried it on a SQL 2012 instance.  It connects to the instance and database fine,  but when I pick a table, I get 2 messages. The first says:

Index was out of range.  Must be non-negative and less than the size of the collection.  Parameter name: index.

The second box says:

The user does not have permission to perform this action

I get the same error on all tables. My login is the dbo for the database I'm using.