Latest Update for r4i that isn't v 1.4 compatible

I have spent a long time trying to find an updated version for an r4i card that isn't v1.4 compatible and haven't had any success. Is this because they stopped making updates for this?

Here:
http://www.r4i-sdhc.com/downloade.asp

Thanks TirithRR. I've been to that page before. Just not in my searches today :)