Help with R4i Upgrade Revolution DS v1.4 - DSi 1.4.1 compatible?

I'm trying to help fix my friend's R4i Upgrade Revolution DS v1.4. He accidentally upgraded his DS firmware recently and was wondering if there was any way to fix this flash card. Google hasn't been particularly helpful in my quest - was wondering if anyone else could help me? Thanks! :3

Can anyone help? I still really need help with this as Google is wielding no results...

Nope, it isn't compatible yet.I hope for you that they ever release an update because they never did anything to their old card (1.3 compatible).