Good APP.
I give it 4 stars for this reason.
The developer of this APP needs to include a menu option for single item clearances, where the user can select what to clear instead of everything all at once. I refer to the menu selections of "Cookies Only" and "History Only", "Form Data Only", "Downloads Only", etc.

Keep the 1 Click All-Clear function, including it in the Options menu.

...and include the 1 Click clear menu option in the browsers context-menu (right click menu). The icon in the top bar can be used to list the above menu options.

Then this APP would be a full 5 Stars.