I always export it as the highest resolution png allowed by Hero Machine. I actually wish we could go even higher, but that’s just me. Another way to get “infinitely” expandable artwork is to print it to a pdf file where it maintains its vector information. The big drawback is that it defaults to 100% opacity for all colors. A big pain in the butt. It really messes with gradient backgrounds used for highlighting. I would make all my files pdfs but unfortunately my extensive use of gradient circles makes it impractical.