All of what you want can be done in LightBurn. First, go to ‘Window’ and select ‘Reset to Default Layout’. If that does not fully recover the entire screen, quit then restart LightBurn using a shift-click to launch. This is a hard reset of the UI layout.
By the way, you have not identified which system/OS is the one you are having issues with.
Take these steps and report back the results, tell us which OS and we can go from there.