After various leaks of the ugopwn exploit, I was finally able to downgrade my DSi to 1.4U and install Sudokuhax and 4swordshax. I made a simple script to make downgrading to 1.4U easier.
Note: EUR and JPN support has been added, but ugopwn does not work with EUR and JPN consoles. The only way to accomplish this on a EUR or JPN without existing exploits is to hardmod.
As such, EUR and JPN versions are UNTESTED! If you have a hardmoded EUR or JPN system and would like to test...
[Release] DSi Downgrader: Easily Downgrade Any DSi To 1.4!
Note: EUR and JPN support has been added, but ugopwn does not work with EUR and JPN consoles. The only way to accomplish this on a EUR or JPN without existing exploits is to hardmod.
As such, EUR and JPN versions are UNTESTED! If you have a hardmoded EUR or JPN system and would like to test...
[Release] DSi Downgrader: Easily Downgrade Any DSi To 1.4!