If you have received the card, there will be a web address printed on the card, that is where to go for the firmware. There are so many clones and versions of the R4, that ~I wouldn't even guess which firmware is the correct one.
download the latest one from the site printed on the card, put it on the R4, if it doesn't work, try another, then another, you can't do any damage, it is the right one, or it is not.
what makes you think that it is not pre-loaded???