Steempeak and Steem Keychain issue

With the recent changes to Steem Connect and charging fees for its use, I am trying out Steem Keychain. A post by Hive account@techcoderx pointed out how to use this alternative method of login. Though it seems its not as intuitive as I was hoping and I cannot seem to add more keys to it.

I logged in with my active key for delegations and that worked, but seems I cannot log into SteemPeak.

When I unlock my Steemkeychain it gives me this error below.

So my question is how do I add my posting key? As the error message suggests, but I looked all over the app and cannot find it.

I attempt to add my private posting key and I get this message, "already registered an account for solominer"

Hive account@yabapmatt Hive account@stoodkev

In the mean time I will need to return to using Steem Connect.