this procedure is not detailed.
you should mention how the port would be applied. you type 81 ..... then? how does HFS know that you are not typing a longer number, like 810. should we add a button "ok" near the port ?
how about this.
main window only show current port as a button, not editable. when we click on this button, another window show up where we can change the port and click ok/cancel.
another thing, i find the on/of button can be misunderstood. when i teach my friend how to use hfs, they always wonder when it shows on, the hfs currently on or they need to press the button to set hfs to on.