Updating App From New Project

I am updating an existing app. Because of the overhaul, I'm starting over from File|New Project. Just to see how the update would work, I ran the old version on the emulator. I pinned the app to start. I copied the old GUID to the new project, and while the project name is different (added a '2' to the title), I changed the Title in the WMAppManifest to be the same as the old file (title changed in both places). Then I run the new version in the emulator.

Keeping in mind that this is a clean project, no code has been put into it. I have deleted all the sample data, sample model view, and emptied the pivot items so it is just "first" and "second" with nothing displayed. When I run it, that is exactly what I get. Perfect. Just what I wanted. The app replaced the old app in the application list. Wonderful. 开发者_运维百科Only one problem. The tile that is pinned to the start screen doesn't work. I tap it and it flickers back to the start screen. No indication that an app is starting (no splash screen), except that for probably less than a half a second the tiles look like they're doing the turnstyle out, then back in.

I'm missing something. When I have updated the app in the past, the tile has worked fine. But now that I'm updating from a new project, it's not. Also, I'm going from 7.0 to 7.1 on the project type, and while I haven't done this before, I would not expect this behavior.

Thanks for any and all suggestions.

You need to set the Startup Object to your App class.