WHAT ==== An application patch is a newer version of the application file. Installing the latest application patch updates your MU.LAB installation to the most recent version while preserving all your user settings. WHEN ==== Minimum full package version >= MU.LAB 3.2.0 If in doubt, best to do a full install -> http://www.mutools.com/downloads.html HOW === 1) If MU.LAB is running, quit MU.LAB 2) Download the latest application patch for your platform from http://www.mutools.com/mulab/patch 3) Replace the current Mulab application file by the new application file in the downloaded zip file Cheers! -- http://www.mutools.com