TDS GTNXi750 Screen Sizing in Air Manager`

[jonnyb6688]

I un-selected "maintain aspect ratio" in the settings section of the GTNXi 750 plugins section of x-plane, then popped out the window and tried to drag the lower edge. It continued to move the right edge out when I did this. I restarted my computer and tried again. Still nothing. I know it must be something Im missing, but am wondering if you could help me problem solve this.
Thank you,
Jon