I installed ARP2600 v1.6 which came with my V Collection.
It worked as did all my other arturia apps.
I downloaded all the updates and all of them worked except for the ARP2600. I get licensing errors and it won't open. I was having similar bugs with the rest of my Arturia collection until they updated the eLicense software a few days ago. I am guessing this is still a bug they need to fix??