Upscale images/ higher resolution

The images generated are small. I want to be able to re-generate the exact same image but higher resolution so I can print them and frame them on a wall or use as desktop backgrounds that change every few seconds, like a wall collage but on a wall of desktop monitors. if you click on the corner of each image it has "upscale" (coming soon). but when will this feature be coming out? I honestly would pay a membership price just for this feature so I can download larger images. I want to be able to upscale the exact same images I have already generated in my account, it would be devastating to lose all of those image I worked so hard to create.