Just wanted to follow up with this as I am having the same issue. When I execute 'pio home' however I get:
PS C:\Users\name> pio home
PlatformIO Plus (https://pioplus.com) v0.10.11
/\-_--\ PlatformIO Home
||  | http://127.0.0.1:8008
and a browser tab opens properly showing what should be displayed in the IDE tab .. any thoughts?
I added ATOM and PIOPLUS.EXE to network firewall settings (win10)