Fear not, the developer was kind enough to publish the .PRG file on their site, so you should be able to manually install it there. Once installed on your device, you’ll need to add it to a data page. Any data page will do, but it has to be loaded somewhere. I just stuck it...
to remove built-up grease and grime. If the grout is in good condition but discoloured, then use good old bleach & a toothbrush to bring the whiteness back (wear protective goggles & gloves) or use a grout pen to restore the whiteness. But if the grout has cracked and fallen out...