I upgraded from a 2016 version of Magix yesterday 13th Feb 2022 after files from my new camcorder (Panasonic HC-X1500 - .Mov files) only partially rendered out in 2016 version, the video going black/blank after about one-third through. I thought it time to upgrade to Edit Pro premium 2022 but I'm already having a minor but irritating problem in that I have no icon thumbnails in the media pool for 4K files either in .Mp4 or .Mov formats. The icons flash on and off but never show an image. I CAN see icon thumbnails for HD clips from another camcorder. Once in the timeline I Do see the timeline thumbnail but still not in the media pool. I also have choppy playback despite proxy files being generated. My old 2016 version played back 4K from the same camera very smoothly, (until that is the video went blank for some unknown reason). PC is Windows 10. I7 processor, 16 Gb RAM, Radeon Geforce GTX 650 graphics card, and the program is version 21.0.1.119 (UDP3)