Why can't I seem to update LabTutor Client on a machine with LabAuthor installed?

When attempting to update LabTutor Client on a PC with LabAuthor installed, you may see an error message which says: 'Cannot update LabTutor Client on a machine with LabAuthor already installed.
This message is somewhat trivial, as it really means: 'Please Update LabAuthor to the latest version, before you can update LabTutor Client'.

Once you have updated your LabAuthor installation to the latest version, you will be able to go and update LabTutor Client.