Thunderbird sub menus

I'm trying to set my SMTP default server in Thunderbird mail. I can get to the main menu Tools/Accounts, but then I'm stuck. Am I going to have to pick by location on screen? As you can see by the attached image, I have to click on the left hand menu "Outgoing Server (SMTP)" and then pick the server and then choose "use default" and finally press OK.

There used to be a plugin for Thunderbird to select the SMTP but no one has developed one in ages and it's a big oversight. Thanks for the help.