Sorry, Scott, the documentation wasn't updated when the changes were made to the connections. In the updated chm file that I posted yesterday, the section Application -> Connection String Management has been re-written to tell about all of the changes to the connection settings. Basically the application-wide connection string was replaced with the applicaiton-wide DataSources collection.
The best way to get the connection string would be to call
MicroFour.StrataFrame.Data.DataLayer.DataSources("").ConnectionString;
If your application has more than one data source, then you'll need to replace the "" with the key of the data source you want to retrieve the connection for.