Forgot wifi password for Powerline PLW1000v2

[MPIC112]

I had disconnected my powerline and decided to reuse it again. I cannot remember my wifi password and also need to change security settings

[plemans]

You can hardwire into it or access it using its ip address to get that info 

There's a support site with access to manuals, firmware, install guides, etc.
Go to https://www.netgear.com/support/
Type in your model number and from there it'll take you to the above.
Its a great resource to start with.