Google Earth crashes


I have suddenly seen my Google Earth application crash when adding postcodes.
Happened since I upgraded to Lion.
I am running an i7, 27in iMac with Lion 10.7.5.
I have downloaded the latest GE and binned any Preferences caches etc I could find from the previous.
I have seen on the GE site that removing the Tips from preferences should help ..BUT NOT!!!
I have noticed that when I UNCHECK the tips box the box frame stays highlighted in blue.. (no other boxes do this).
Other than that I am stumped.
I have tried TWO separate downloads and installs.