According to the DaVinci Resolve website, 4K support is now included in the free version.I'm using Davinci Resolve (Studio, because of the 4k option mostly) as well. The workflow of Davinci Resolve really kickstarted me, a noob, into video editing, color correction and grading, noise reduction (combined with Neat Video). Standard edition is free (no 4K), and Studio edition is "only" 300 dollar which is far less than Premiere Pro for example. You could probably try out the standard edition and upgrade later if you really like it or need the 4k option.