Redirect Google Earth to use "myplaces.klm" stored on a NAS so that it is available and synced on all your computers and mobiles.

Thanks to:
http://mutterances.com/google-earth-change-location-of-my-places-kml-files/

Note: I use a Synology NAS running the Cloudstation package and have the client installed on all my PC but you could do the same thing with Dropbox.

The idea is to go into GE settings and change where the "myplaces.klm" is stored.
We instead store it in a cloudstation folder and it is available to all computers
running the cloustation client.

Here are the default file paths in Windows OSs for the GE "myplaces.klm" file.
C:\Documents and Settings\username\Application
Data\Google\GoogleEarth\myplaces.kml (XP)

C:\Users\username\AppData\Roaming\Google\GoogleEarth\myplaces.kml (Vista)

C:\users\username\appData\LocalLow\Google\GoogleEarth\myplaces.kml (Windows 8,
Windows 7 and later installations on Vista)

To re-assing the new location that GE will save to/read from the cloustation, do:
Regedit / "HKEY_CURRENT_USER\Software\Google\Google Earth Plus\KMLPath" and enter
new path to cloudstation location (or Dropbox).

Note:If you should want to manually copy the .klm file for any reason, make sure that 
Google Earth is exited in all computers that are running the cloudstation client.

That's it, your "myplaces.klm" file is current, synced and all your saved way-points are available to all your PCs and even your mobile devices, assuming you have a client for your NAS or Dropbox. installed on your mobile.
Cheers