Good news for Google Earth users. Google Earth Pro for PC or Mac has previously been available for $400, but Google is making it available for free. After you Download Google Earth Pro and install, for first use, you will be required to enter the user name & license key. The link to getting a “trial” leads you to this => page, where however as of today the license key is at the top of the page. Use this and your Email as username to log in. You might probably want to save this on your home PC.
This professional version in comparison to the free version, offers lots of key features which you can find out about on the Google Earth Pro project page, which include in the new 7.1 version tools for creating maps.