Many users have reported that after they upgraded to Windows 10, Wonder Lister will get stuck at connecting to database step on startup.
The reason we have found is that Microsoft SQL Server service startup mode gets reset from Automatic to Manual and therefore it does not start automatically. So, we need to check and correct the startup mode back to Automatic. To do this:
Control panel : Administrative tools : Services
Scroll down the list until you see: SQL server (wonderlister)
Double click it.
Change startup type to AUTOMATIC as well as start it.
Then run WL.