Google Terrain Maps now Black

[timelms]

Apologies if this is a dumb question, however I am newbie to this stuff.

I use Google Earth and one of the things I did I will ago was "enable" viewing Google Maps in GE (via http://www.mgmaps.com/kml/).

My main driver for doing was this was to be able to see contours in GE, which are accessible in GM Terrain view (but not directly in GE).

This worked fine for a while, however now when I try and do this, the GM Terrain maps are black and no detail (let along contours) are available - see attached.

Is there a fix for this?

Many thanks