I have a powerline kit consisting of:

TL-PA8010P(US) adapter 

TL-WPA8631P(US) extender with wifi

Both units show "Ver. 4.6" which I interpret as hardware version 4.6

I am having problems with unstable / dropped connections from the extender so I would like to update the firmware on both devices to the most current versions.

I can find the firmware update for the TL-WPA8631P extender, but I cannot find a firmware update for the TL-PA8010P adapter.  

The current version of firmware shown via the tpPLC utility for the apater is 2.7.0.44-02_801104_220725_901

Is there a newer firmware available, and if so, where can I find it?