Swapping all instances of an SVG to a PNG

Hello,

I am animating my SVG images, however when I upload my project to Captivate Prime, my animations are very choppy. I tried changing a few of these SVG images to PNGs, and that fixed the issue. What I need to do now is change all instances of SVGs to A PNG instead, but when I select the image in the library and try to import another image in it's place, it only lets me select another SVG, not a PNG. Is there a way to swap an SVG with a PNG and retain all animations I have without doing them all again???