The wikimedia redirect exploit which I used to make this site work has been patched and doesn't work anymore, so the upload method I used is now outdated.
For hosting images on the Scratch forums, I recommend JeffaloBob's Extension/Userscript! It's a lot more user-friendly than this site could ever dream to be.
If you still want to see the old homepage for this site for some reason (even though it does not work anymore), you can go here.
You can look through the code yourself here.
You can reach me via my Scratch profile or email: fupicat at gmail dot com.