Thank you ALL for your help!
Solution:
1: Set interactive mode.
2: Delete ALL network rules manually.
3: WITHOUT rebooting, manually shut down Tixati.
4: WITHOUT rebooting, manually shut down OpenVPN.
5: WITHOUT rebooting, start OpenVPN again...
6: Now you get prompted to allow all such traffic.
Bam. Now it works.
For good measure: Before this fixed, I saved a restore point "known faulty". So now, I reset windows to there, verified that now the problem was back. I applied the above fix again, and it solved the problem.
Then I restored to "known faulty". Applied