Where can I suggest a feature for the newest version of tpPLC?

@TP-Link, newest version works fine. I was using a previous version by choice, the older version still shows me the link to open up the web interface of the unit directly, newest doesn't have this...

When I open tpPLC I see the image below and nothing more. It doesn't continue to load even after 30 minutes of waiting there. Windows task manager shows the application is running normally, not...