Can I turn an ASL file into a PNG?

Hello,

I've been trying to find a good quality diamond texture graphic for my artwork. I have finally found one that is good enough quality but the creator only provides an ASL file format. I don't like using Photoshop for my collages since i can't get a full version off Photoshop on my iPad (I draw using the pen, i have to see the pen when i draw and i can't draw using a mouse, its just unnatural). I use procreate to layer images and draw/cut directly on the image. I have no idea how to turn an ASL file into a PNG file so i can use it in my Procreate app. Any help would be appreciated!