Is Forge Picky about Card Image Size?

I noticed I didnt have any Khans tokens when I was playing in Forge, but I had the HD full scans from CCGHQ's Mediafire (non-cropped borders). So I figured out the proportions of the tokens by opening one of the ones in my forge folder, and upscaled that to 300dpi, and saved all of the khans tokens like that.

Here's the warrior token I'm having trouble making show up in Forge.

Here's the warrior token I'm having trouble making show up in Forge.