There was a change between v10 and v10.02 that caused the AA to happen when zoomed way out, but unless you have something else loaded, like some vector data or are perhaps including a distance scale on your output, the new build should fix it.
I'm curious why the AA is an issue at all since it only happens when zoomed so far out on the data that the multiple individual pixels would be blurred into one anyway. It seems that the AA would improve the appearance in that zoomed out case anyway.
Thanks,
Mike
Global Mapper Support
support@globalmapper.com