Winforms .exe in MSIX Package Does Not Startup After Auto Update

Roy_MacLachlan 

I deploy an MSIX app to a shared folder from where my users will install from.

I have 2 versions, the old .3501 and the new, 3504.

MasterData.appinstaller points to the new version.

I make 2 copies of the .appinstaller file, one called New and the other called Old.

Then I modify the MasterData - Old.appinstaller file to point at an old version (.3501).

It should look like this:

<?xml version="1.0" encoding="utf-8"?>
<AppInstaller
Uri="file://XXX/MasterData/Test/MasterData.appinstaller"
Version="2022.329.1519.3501" xmlns="http://schemas.microsoft.com/appx/appinstaller/2018">
<MainBundle
Name="067d1aa7-6a9d-4195-b04c-4dc1f12837c1-test"
Version="2022.329.1519.3501"
Publisher="CN=XXX"
Uri="file://XXX/MasterData/Test/MasterData_2022.329.1519.3501/MasterData_2022.329.1519.3501_x64.msixbundle" />
<UpdateSettings>
<OnLaunch ShowPrompt="true" UpdateBlocksActivation="true"
HoursBetweenUpdateChecks="0" />
<AutomaticBackgroundTask />
<ForceUpdateFromAnyVersion>true</ForceUpdateFromAnyVersion>
</UpdateSettings>
</AppInstaller>

Then I delete MasterData.appinstaller and copy MasterData - Old.appinstaller, and rename it to MasterData.appinstaller.

Then I install the app by clicking MasterData.appinstaller.

Then I close the app.

Now I want to simulate an upgrade of the app.

First I delete MasterData.appinstaller. Then I copy MasterData - New.appinstaller and rename it to MasterData.appinstaller.

Then I go to Windows->Start and run MasterData. The upgrade dialog appears:

I click on Update and the update finishes. The dialog closes, but nothing happens. <- This is the bug.

Then I click on the Windows button, and the upgraded app opens.