PE 15 crashes previewing video-files on MacOS High Sierra

Ever since i upgraded to High Sierra on my 4 iMacs PE15 has been crashing every time I preview a file from the media window. The crash happens when I either play back the video in the preview-window, move the preview-window, resize it or otherwise touch it. Has anyone experienced this and found a way to fix it? I have been in contact with Adobe Customer support for probably 6 hours trying to find a solution, but they seem to not really care to help me at all 😕😕 Would appreciate if someone here had some tips or tricks that i could try out

_Thomas