Solution
Applied fix or countermeasure, visible on support community
- Kill the EskoSubscriptionNotifier Process (NOTE: this is NOT a service, but is started at login)
- Stop the Esko Subscription Service service
- Remove the 2 files in the C:\ProgramData\Esko folder: EskoSubscriptionServiceRequest and subscriptionservice
- Restart the Esko Subscription Service service
- Start up ArtiosCAD