This firmware need to use the tpPLC utility , here is a FAQ how to update: http://www.tp-link.com/us/faq-1614.html

router can set no security

I just see a notice about the WPA 2: http://forum.tp-link.com/showthread.php?101094-Security-Flaws-Severe-flaws-called-quot-KRACK-quot-are-discovered-in-the-WPA2-protocol Hope this helpful :)

Try different outlets. Reset and pair again

You mean it's printed as: xxxxxxxx: PIN? Never seen one like that. it should look like PIN: xxxxxxxx.

when you add a new rule, choose "Any target"