How can I turn night mode off? Version 2.1.54

Hey, I recently downloaded the new Version für M1 Apple. Now the white background turned into black as we know it from night mode. I could not find any settings where I can change it back to day mode. I really need that because I cannot learn from white on black. Can somebody help or do I need to change back to the previous version?

Tools > Preferences > Tab Basic. Change from Theme: Dark / Theme: Follow System to Theme: Light.