Pax

Your only viable solution is to uninstall 16.2, install 16.1, and if you don't have settings backups from 16.1 redo all the rules from start.
It's a pain but it will save you nerves and time in the long run.

I honestly thought this was a bug.
This is a huge regression from the previous version, without an option to roll back to the previous version both in UX and features. People who don't fiddle with these options will use automatic mode.
On top of that, there's not even an option to download the previous version under advanced download anymore...

But why would you release such unfinished state of application and essentially make beta testers out of users while removing expected functionality until some time in the future you say?! Makes zero sense to treat users like that.

There is an option in advanced setup to block ESET product from making automatic version upgrades, it's under Update > Profiles.
I had to find EIS version 16.1.14 elsewhere, since ESET themselves don't provide old versions, at least publicy. Of course I checked file signatures to make sure it's the official installer and not tampered.
 
I use interactive mode. I tried many things but I didn't take note, so to stop wasting time, I just downgraded the version altogether and now everything is working as intended.
 

Since 16.2.11.0 Interactive Firewall mode prompt does not pass Remote computer and Remote port values to the rule creating window. 

The only option left is to allow Any for this program. That defeats the purpose of the interactive firewall.
Plus, accessing rules requires more clicks. And 16.2 rules table missing ports and protocols columns.
ver 16.1

 
ver 16.2