If you click the gear wheel icon to the side of the Chat tab, then click on Style
this allows you to check or un-check 'highlight the squares of the last move made'.
(remember to save changes made)
To change board colors, those options are on the same Style page on drop down boxes.
How do I change the board colours and particularly the highlights? When my opponent moves I see a kind of yellow/green coloured square but its like an in between colour for me and my eyes go wonky looking ta it as it "switches" between yellow then green then yellow then green and so on and so on.
Thanks for your help.
Chad