The xxx3 seems to be a slightly upgraded version that adds a colour LCD and USB charging ports. Apart from that, it seems to have the same features as the one without the 3. And the -R seems to indicate a “restored”/“refurbished” model.

Did you configure NAT to the service(s) and/or DMZ to your internal server in your ISP’s router?

Not allowing even ping seems like it is against any sane networking configuration.

Hmm… I remember buying the license for ST2 back in the days and it specifically saying it’s for ST2.x only. However, it also worked for early ST3 versions but stopped working at some point. Which was when I’ve switched to something else.

After having been shafted by sublime text I will never believe anything called a “lifetime subscription” is such.

Care to elaborate?

AFAIR SublimeText licenses are always only for a specific major version. And they sometimes might work for the next major version. So, I guess you’ve just installed a newer version for which your lifetime license isn’t valid anymore.

Even if you pay they have no incentive to get you to stop paying (i.e. find a partner).