'Suppress alert asking what kind of tab/window to open in tmux integration' option prevents normal windows
If you set 'Suppress alert asking what kind of tab/window to open in tmux integration' to 'Yes' (or click 'Remember my choice' in the window that asks what tab/window type) then it is seemingly impossible to open a normal tab/window should you want to.
The menu options all open tmux integrated (in my case) tabs/windows and I can not override anywhere otehr than turning this option back off.
Maybe an additional menu item should appear?