The only thing I can suggest if you don't wish to purchase the Google Earth Pro, is to uninstall the original Google Earth software and reinstall it. I had the same problem and apparently had a bad/corrupted download. When I uninstalled/reinstalled everything worked perfectly.
Just as a caution, after you've uninstalled the software, and BEFORE you reinstall it, check your system for any remnants of the old software. You might also do an Advanced Search of your whole system (not just your Index) to see if there's any files or folders from Google Earth, and if so, just delete them from the Advanced Search list.