I'm trying to install the Stock Trader 6.1 application locally on my laptop and I'm running into an error in the database connection section that I can't get past.
I have SQL Server 2014 Developer Edition installed, on Windows 10. I tried my initial install against a default instance, and that failed. I then read some other threads about how it works better with a named instance, so I created a named instance and tried
that, but it didn't work. Finally, in desperation, I installed SQL 2014 Express Edition, thinking that maybe it had to be Express, but that didn't work either.
I can connect to all of these instances with both SQL Server Management Studio and with Visual Studio 2015's Server Explorer, but in setting up the Stock Trader app I get the below error.

Any help would be much appreciated.