Hello Curt,
From what I can see, you already have the theme modified a bit, so I can't say for sure the exact way to modify your title bar.
However, normally, the top frame can be changed via
AI_CF_FrameTopMid, in the
"Themes" page -->
"Images" tab.

- Screenshot_87.png (29.16 KiB) Viewed 1494 times
The replaced imagine should have the same size as the previous one (in pixels).
Hope this helps!
Best regards,
Catalin
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