Anybody know anything about the Avia Slider?

I’m using a theme called “Choices” which features a slider called Avia Poly.

This slider is making my images larger than necessary. I optimized my images and brought them down to ~45 KB (they’re transparent PNG’s so they started much larger). When I insert the images into the slider, they’re coming out on the front end at ~145 KB! This is much larger than they need to be and is effecting site speed.

Any suggestions?