The colored tabs are not at the bottom of the screen no more
Hi, go to the ‘window’ tab at the top, in the dropdown menu make sure ‘cut palette’ is selected.
On that same menu, you can also ‘Reset to Default Layout’ to restore back to the beginning layout. You can also force a hard window reset, close LightBurn, then re-start holding the Shift Key when you launch LightBurn.
Let us know how you progress.