When upgrading an existing Picard installation, the first wording shown when running the executable is

MusicBrainz Picard is already installed.
Click "OK" to uninstall the previous version or "Cancel" to cancel this upgrade.

This wording doesn't really reference the fact that an upgrade is happening and always gives me pause when I read "ok to uninstall".

A potential solution would be to change the wording to something such as:

MusicBrainz Picard is already installed and will first need to be uninstalled.
Click "OK" to proceed or "Cancel" to cancel this upgrade.