Hi Marcello,We don't currently support previewing to an attached device for DPS 2015. The only way to preview in DPS 2015 right now is to build your own preview app in App Builder. We realize this isn't the most efficient workflow and are working on ways to make it better.Neil

Please take a look at this document: Disable auto-updates | Application Manager | IT administratorsLocate the AdminPref.dat file and change the value from 1 to 0 - see below