Since version 6 the Torbrowser is codesigned on MacOS. Due to the new folder layout necessary for this change the user profile is not stored in the application bundle anymore. This means that you will not lose your settings anymore when overwriting an existing Torbrowser. The caveat can thus be removed.
This updates TorBrowser to the latest alpha and renames it to that from experimental as that is the name used by the TorProject itself.
It also changes the language to en-US instead of nl and adds some caveats to update with built-in update mechanism thereafter to keep local settings.