How to switch dashboard / Change Activation Code 

-- You can't copy settings and maintain things this way, because settings don't copy settings between different activation codes. So please buy all licenses in a single order if possible.

-- Wow, so the dashboard encourages purchasing more licenses, but it can't merge a newly purchased license into the current dashboard, any new licenses wind up as their own activation code. 

-- You can manage your multiple activation codes from a single portal login by changing the Change Activation Code. See the below screenshot for Change Activation Code.