Just a heads up. I also bought it here for $25. Got tired of waiting, so I signed up for his patreon. And can tell you that 3.20 is the best version. Versions 3.30 and 3.33 are the last versions. He stopped updating the app. I tried both. They are slower and use more gpu power. 3.30 I think was about the same as 3.20. Also HDR does not work on 3.30 and yuv beta was removed from 3.33.
Side note. I subscribe to other patreons. My patreon fees are do on the first of the month. I signed up for his patreon, and it said '$10 will be do on the 1st of the month.' I donwloaded the two newer versions of dain-app, then cancelled the patreon and was not charged. The others on here can try this, not sure it will work as it did for me. You might need to already have a patreon for it to work. Just think it's unfair he isn't uploading the new versions for us that paid here. So, good luck.