My thoughts on this subject? Glad you asked...
A PDF manual should be installed when the application is installed. The help menu item for such a PDF should link to that installed copy.
If Xara/Magix desires to ever have a link to the web for a manual, it ought to be a proper html5 version that can be updated and have a full index of terms to aid in searching.
A new PDF should be installed during an update.
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