Go to the Login Screen like @applecheeks37 wrote. Not the Lock Screen! An easy Way is a simple Reboot. On the Login Screen click on your Profile so that the Password Field appears. It has to be appeared! Without it will not work. When it is appeared, You should see in the bottom right Corner a Gear Icon. Click on it and choose the Option ''Zorin Desktop on Xorg''. It should look like this: