I want to upgrade from Zen3.2 to Zen 6.5.

First:
Would it be better to remove Zen3.2 and install Zen 6.5 fresh?

Second:
Novell Course 3040 states it is designed to Upgrade an existing ZENworks
for Desktops 4 system to ZENworks 6.5 Desktop Management. Being I am at
Zen 3.2, would this be the course I would want to take?

Thanks in advance!