Hey Guys,
I managed to get the ASC to install using a technique on this thread and also making sure that ASC was enabled in their Settings - General - Login Items on My Mac. I run Ventura and hadn't been able to get the software to install despite uninstallingand following Arturias technical advice. If you have a Mac.... Here Goes!!!
1. I downloaded & installed Piano V (ie new instrument).
2. Launched it - it reported itself as 'not activated'.
3. From the list of activation options, I clicked the one "Open ASC to register & activate".
4. ASC launched, I logged in, synchronizate proceeded, then voila (oooh, sorry....) there's all my products!
5. Finally, I activated Piano V successfully.
I can see the list of 'not installed' V5 applications there with "Download" button. My assumption is that I can (when I want) download & activate this way.
Remember - ENSURE that ASC is activated in Settings/General/ Login Items.
System - MacBook Pro Max - Ventura Latest Versions.