When using EF Database-First wizard for EDMX creation, there is a dropdown containing connections that were created previously; these may linger around long after the database is no longer relevant. The connections cannot be edited or deleted from the wizard interface, only new ones created.
See screenshot, under "What data connection should your application use to connect to the database?"
Where does dropdown data get stored, because I so want to clean them up / blast them away / nuke them forever / start with a fresh slate?
I am using Visual Studio 2015, but it's probably the same for other versions.