Computer needs to repair.
Can't log in on another machine.
When Sketchup opens it will prompt you to 'manage activations.' Click the button and you will be redirected to the Trimble website and you're account. From there look click 'View Included Applications' dropdown and just below 'Sketchup Pro' there is a button to 'Manage Devices.' Click the button and you'll be able to sign out of all machines.
Restart Sketchup and it will be good to go.
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