I've never used Profit but after looking at the xml here are a couple things to try.
Right click and choose Window Settings.
Click the Default Opacities button and see what that does.
Try changing the dropdown with the Frame and Titlebar choices.
Try pressing the triangle on the left end. That button shows and hides the titlebar.
If none of that helps:
Try the command
/show_window MainHUD.BottomBar
and
/hide_window MainHUD.BottomBar
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