After building a Windows 10 export for VS2015, you can open the project in VS2015, however the package.appxmanifest only opens in Code Mode and not the designer where you need to upload your App icons and stuff like from Windows 8. Also I get the build error as you can see in the screenshot below, but once again even when I change the build version to 10.0.10240.0, it still giving me the same build error.
Operating System and Service Pack
Windows 10 Professional Build 10240
Construct 2 Version ID