I thought my comments went up yesterday, but they're not there. I posted similar comments on the App Store.
This application is not needed to use the excellent Logitech Solar keyboard. And it's a resource hog, poorly written and implemented. Whether or not the application is being run, whether or not the keyboard is actually connected, and even after the application itself is removed, it runs a "Solar Service" subsidiary application from the Library/Application Support/Logitech folder, constantly writing error messages to the system.log file. It creates thousands of error messages, and overwrites the system.log so much and so fast that you cannot see other more important messages. The system.log file becomes huge, and the drain on resources can extend to double-digit percentages.
To remove it, you have to shut down the service, remove the files, and force-empty the Trash. You can use the Console and Activity Monitor to see the drain and problems from the application.
The keyboard is excellent, but this utility is not.