I've exported most other file types just fine, but when I go to export an HEVC, it starts exporting and about 30 seconds to a few minutes in, the Export window just disappears and takes me back to the timeline edit screen. At that point, I can't export anything because the export window never shows back up again and I have to restart the program to get it going again. Since purchasing the codec, I have never been able to successfully export an HEVC.
Windows 10, Quadro P2000, 32GB RAM, and Movie Studio Plat. 2022 Ver: 21.0.1.92 (UPD3)