Yes, it's a good idea to let the merchant know if you are having trouble. Sometimes it is something you are doing incorrectly, but I've also found that I've discovered problems that the beta testers missed.  So it gives them a chance to fix it if it's a problem with the file or texture.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi