Can't open Lighthouse Studio - possibly due to an update?

My lighthouse studio has stopped working again and I suspect this is because there's an update and my network admin has blocked it.
The error message says "unable to reach http://account.sawtoothsoftware.com" but I do have access to the account page so I don't think that is the real problem.
Is there another server or page it might be trying to access?
Last time I solved this problem by tethering my phone and bypassing the company network to get the update but IT have made that no longer possible!

Resolved
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