@Neil_zx Hello, 

Thank you for your clear post, unfortunately we did not find another firmware for PA4010 (EU) V3 except for TL-PA4010(EU)V3_180914, this is the latest firmware for now. 

If there is any, that should be a very outdated one.

Powerline rate on the tpPLC Utlity  is an indicator for the powerline environment, this should not be effectd by the firmware of powerline units (of the same model & same hardware)

Make sure powerline units are plugged into the wall sockets, and you could change a different wall socket for the powerline extender. 

The performance of the Powerline device may be affected by various factors, you could follow this instruction and see if that helps with the powerline rate: 
https://www.tp-link.com/support/faq/409/   

If you have checked the above factors mentioned in the FAQ, 195Mbps is not bad nor very good, I'm afraid that the best powerline rate the kit could get.
 

@Neil_zx 

Hi, Can I have a picture of that 'The utility does not recognize this device for what it is but lists it as a plc'?

--or  After reset, TL-WPA4220 was no longer on the utility at this moment?

May I know what is the current firmware version of TL-WPA4220_V4(EU) as well?

And did the 2nd powerline light still lit up on both of them?

Thank you very much.

@Neil_zx 

Hi, Sorry for the delay.

I have sent you another firmware which would help us with the current issue'

Please have a look and try to update that firmware;

Thank you very much.

@Neil_zx Hello, 

May I know model of your Windows computer and its Windows OS? This is the first time we get similar feedback on 4220 V4. 

Here is beta tpPLC Utility for Windows, please let us know if this Beta works for you:
https://static.tp-link.com/beta/2021/202101/20210122/PowerLineUtility_beta.zip