After some testing I came up with this:
Affinity V1 - doesn't care what you do. no net, filtered traffic but V2 DOES care.
The whole "Affinity can't communicate with 'other' apps is smoke and mirrors, especially when there is only one program loaded on the system.
The below spoiler is only one small capture two launches. Which qualifies as the mothership or ships (to me)
@stokerg yes, it was (filtered) - my laptop is always in a locked down state because it goes outside the flat.
The bit about "as it says, trying to communicate with your other installed Affinity applications. " is false when you have only one application installed.
no need, no reason to "com" fail due to non-existent other applications installed.
(to me) this is a hybrid cloud based product. (for now) the easy solve (for me) V1 on the laptop and V2 on the desktop