I installed Visual Studio Community Edition on the Windows 10 Insider Preview and got a pop-up message that told me that I needed to enable Developer Mode on my device.
The pop-up told me to go to the Settings to do this – but the option is not available there.
The solution is to open the Group Policy Editor and browse to:
Local Computer Policy, Administrative Templates, Windows Components, App Package Deployment
Select the Allows development of Windows Store apps and installing them from an integrated development environment (IDE) setting and set the state to Enabled.