Conflicting 'My Places' in Google Earth Pro installation on Mac

when I install google earth pro how to remove old versions i.e. My Places Path: "/Users/admin/Library/Application Support/Google Earth" Cache Path: "/Users/admin_1/Library/Caches/Google Earth"?

There are some "conflicts" between my places from old Mac with it at new device, so I can't save kml or kmz at new MacBook device

[Re-Titled by Moderator]

Original Title: google earth pro