Well, it caught me as well.
However, Fusion 5's last supported OS was the initial Mountain Lion release. Mavericks was Fusion 6 only (sure, 5 worked, but). So, basically, been a dead product for two years now.
/Applications/VMware Fusion.app/Contents/Library/VMware OVF Tool/ovftool
will export your virtual machines in a format that VirtualBox can use. And VirtualBox is free. Might be suitable stop-gap until one decides whether or not to re-up with VMware, or maybe Parallels, or keep using VirtualBox.