Strang gray icon never seen in MP icon in tray
When it is grayed out like that, it means it does not have a connection to any Secondary. If you can traverse to one, then that is showing in error.
That you can't copy / paste is always a firewall issue.
That all said, this seem like a perfect case where a nuke and reinstall is in order (not as painful as it sounds):
Allow files to be dragged between computer is GRAYED OUT, and cant be checked. Im on a PRO license to.
What determines that is what key is used, you have KM and KVM on your account - make sure to use the KVM one when you reinstall from the purge.