vCardSplit is something I wrote years ago for a friend.
To my amazement, it's still needed today.
It splits vCard files. Lots of programs like to export their contacts as one big vCard, but will only import the first contact from a vCard file. So you need a vCard Splitter, and this is it.
It's absolutely free to download and use, and always will be. Unfortunately, that also means I the support I can afford to offer for it is rather limited - sorry.
Download vCardSplit here.