Sprite Sheet Frame UV problem

[mbitzos]

I just purchased Shadero with the intention of using it with sprite sheets (as most of my assets use them because of animation).
I had read several threads that had pointed to using the Sprite Sheet Frame UV, and using the frame size and frame number to use it correctly (as seen in this thread).

When I use it, the preview is all squished and not correctly aligned.

The only reason I can think of is that my sprite sheet is not a square, its dimensions are: 89 x 329. Additionally there is padding and offsets.

Now my question is: Does Shadero Sprite support uneven sprite sheet sizes as well as offset/padding within the sprite sheets?

Thanks again.