Well did you modify anything (e.g. removing the XP window would have this symptom)? Apart from that you could have set it to invisible via its window settings (hit F10 to make it visible and change the settings), resized it to 0 (use the button in the ControlCenter to reset the size) or moved it off-screen (open ControlCenter, paste
Parent.Parent.ProfitUI_BottomBar.Location=0,400 into the textbox and hit execute).