When this happens you can expand it from this -

to this -

And from that point on, you can't open it any farther.
TrackIR still works, but you can't make any changes because you can't open it up to see what you're doing.
Now that I have a VAST amount of experience in XML





SHUT UP!

OK. Now that I have the slightest bit of a clue about XML, I've found a solution.
Where ever you've installed your TrackIR program, you'll find a file called Settings.xml.
Right click on it and choose Edit.
At the very top, you'll see these settings.

I changed the 160 to 1600. And the 27 to 1000. Use any size that works for you and your monitor.
Save it, of course, and if you don't want it to change back, make the file Read-Only.