A standard ProPresenter 6 license required a serial number and often an online activation. A typically does one of three things:
Improved coordination with Planning Center Online for sequence and arrangement management. ProPresenter 6.0.3.8 Patch
Contrary to rumor, Renewed Vision sell ProPresenter 6 licenses anymore. However, if you own a valid ProPresenter 6 license (from 2015–2018), you can re-download version 6.0.3.8 from your official account at renewedsvision.com. You do not need a patch. A standard ProPresenter 6 license required a serial