CCleaner Does Not Start

Just bought the Pro bundle, and after validating it and Defraggler, CCleaner now just plain doesn't run.

Even going into its origin file location and clicking on it, my laptop will hum a bit and seem like it's about to start running, and then nothing.

And that's as far as I get no matter how many times I click, or how long I wait.

Should I just uninstall and reinstall?