Just had a thought that since this is a custom built box you might need more than just that. it has an AMD FX 6300 6 core processor, 16gb of Ram, 4TB HD (western digital I think though not entirely sure at the moment) Win 10 version 1809 (recently upgraded from win 7 which used a theme called Blade for forever it feels like). and a Geforce GTX 950 vid card. not a top end system but not a complete potato yet. for the life of me I cant think of what would cause the Evolution theme to not show thumbnails and most of the folder Icons