Simon Wendsche
about 2 years ago
Please send me a message so I can check if this is a bug in the addon, or some other problem, and how to resolve it.
It would be good if you could open the Blender console and see if there are any error messages. Knowing your OS and Blender version could also help me, as well as info about the problem: Do the thumbnails never shop up or do they sometimes work, do they work in some .blend files but not others? Having a testscene could also help, maybe something in your startup .blend is causing the problems.
Of course, if you decide this is too much trouble, I'm also happy to offer a refund.