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.
If you're considering applying a patch to your ProPresenter installation, please follow these best practices: ProPresenter 6.0.3.8 Patch
usually addressed critical stability bugs early in the software's lifecycle, such as video rendering issues or Stage Display glitches. Installation: Contrary to rumor, Renewed Vision sell ProPresenter 6
: This version made it easier to quickly edit typos or adjust line counts across multiple slides simultaneously. Status and Availability Contrary to rumor
: Addressing issues where certain video codecs or containers (like MOV or MP4) would fail to trigger or stutter during playback.