Model import not working Windows 10

I purchased ArmorPaint. I downloaded the samples but when I drag the sample .obj / fbx into Armor Paint it does nothing. I tried it on Win7 and it works.
Are there any runtime libraries required?
I have found other unanswered complaints of same problem. Will this be fixed or should I ask Paypal to refund me?

I managed to solve this problem by moving the ArmorPaint folder to the root of C:
I had a similar problem when loading a model crashed. After that it would not load models. Deleting the config file fixed the problem