Solution –
LOG IN to your Caltrics account on your new PC
Hover over your logged in account name and click/tap MY ACCOUNT
Click/tap the first ICS URL, immediately below ‘Your calendar connection link is:‘ (NOT the second one that contains your email address!)
Click/tap ‘Subscribe’ when prompted (Outlook users may be prompted to, and should, ‘Open Outlook?’)
The speed at which the events of the selected calendars will appear in your calendar app will be dictated by the following Refresh frequency of the main calendar apps