Mastercam X4 Maintenance Update 3 is a cumulative installation that contains all of the bug fixes in X4 MU1/MU2 and more. All of the translators have also been updated to the 2010 versions. This must be installed on top of Mastercam X4 or X4 MU1 or X4 MU2. If X4 MU1 or MU2 is already installed on a system, the "Mastercam X4 MU1 (or MU2)" entry in Add / Remove Programs (Programs and Features in Windows™ Vista and 7) will be replaced with the MU3 entry. If MU3 is uninstalled, your Mastercam version will be rolled back to X4.
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