Hi Jamest2305,
You need to uninstall and re-install DPM 2012 only if you have apply SP1 beta.
For other case (DPM2012 RTM, CU1, CU2, CU3), DPM setup wizard will detect that DPM 2012 is already installed and will proceed to in-place upgrade to SP1.
Don't forget to backup your DPM DB before any operation.
Stephane
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