Hi dave , welcome to to the forum...
as you said... you should never update without updating cards first lol...
so this is the propblem you will now have, your console is now blocking the flashcards, so can't be used to update the cards.
you will need a console running older firmare to perform the updates as you console is now blocking the flashcards.
for first card: R4i 3DS from WWW,R4i-SDHC.COM
download the latest fimrware.
stick it on sd card, pop into r4 card and put in an older console.
then follow the manufacturers instructions detailed below.
your card should now work in latst console..
unfortunatly it looks to me like support has stoppped for that card.
there is no updae available yet for 1.4.4dsi or V4 3ds, i would keep cjecking that site, maybe something released in the future...