I'm getting the same issue. I've installed the .NET Framework version linked from the download page, but it still won't progress past a black screen. It is also generating crashlogs.
Excerpt:
Exception
Object reference not set to an instance of an object.
at Bronze.Monogame.BronzeAgeGameBase.Update(GameTime gameTime)
Repeated over and over every second while the 'game' is 'running'.
EDIT: .NET Framework 4.7.1 does fix the problem. Am running a working game in the background as I type this edit.