I just installed Magix Movie Edit Pro Premium 2021 on my Dell Optiplex 790 with 8 GB of RAM and Intel Core I 5 3.10 GHz processor. I have Windows 10 Pro 64 Bit. When I import a video into the timeline and hit play there is sound but no video playback in the monitor in the software. Also, in the timeline there are no thumbnail pics on the video clip.