I am having the same issue. I have Designer (but not Photo) installed on my PC desktop, and Publisher doesn't recognize it. I've confirmed that Designer is the latest version, and I've started it up (several times) since installing Publisher. I even did a reboot, because hey, sometimes that helps. Nothin'.
On the other hand, I put Publisher on my laptop, upgraded my Designer & Photo installs there, started them up, and StudioLink works in Designer no problem. So, 50% success! Still, if anyone has any thoughts it'd be appreciated.
