TMEditX The Ultimate MSIX Package Editor plus TmMsixDeploy
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Signing and Re-signing packages
TMeditX will automatically sign your MSIX packages when you to add your code-signing certificate and password into the TMEditX configuration.
You configure this in the tool configuration panel of the File menu tab shown here:
With the "Update Package Publisher from cert" checkbox selected, TMEditX will ensure that the Publisher field in the AppXManifest file matches the subject field of your certificate automatically, updating the manifest when you save and sign the package.