FSEarth causing FS9 to stutter

Some of you may be familiar with the excellent FS Earth by Luciano Napolitano. I've had it for several years but recently it's causing FS9 to pause briefly each time the aircraft's position is updated in Google Earth via the FS Earth Link executable.

I've posted the problem on Luciano's forum but the only advice he can offer is to turn off anti-virus especially Avast.

I've done that and also disabled the firewall but the problem remains and makes FS Earth all but unusable. It's doing it via wired and wireless connections.

The crazy thing is it will run fine with FSEarth on the FS PC and only causes problems across a network. I'm sharing the correct folder with full read/write access so I know that's not the problem. I'm wondering if later versions of Google Earth are the cause. I'm running 7.0.3.8542.

It's been suggested I run Process Monitor to see if that will highlight where the problem lies. Trouble is I don't know how to setup PM to show this. If anyone does I'd be very grateful.

I'd appreciate any help on fixing this really annoying problem, thanks.