Hi Marcus,
Thanks for bringing this up. There is now a new checkbox "45 °" next to "Google Satellite" in the layer switcher. This will allow you to turn the 45 degree view on and off.
As a bonus: There is a new color button at the top of the Layer Switcher, that will allow you to change the color of the map background. Note this color will only show through the map if the base layers transparency is less that 100%.
These changes may require a page refresh (F5) or a clearing of your browser cache.