Alas, promising, but no cigar. Like CCleaner, Flash Cookie Remover assumes installation of Macromedia or Adobe Flash -- it can neither see nor delete flash cookies used by Google Chrome's Adobe Flash plug-in.

An Introduction to Flash Cookies; How to Manage Them Mar 16, 2011 How To Clear Cookies, History & Browsing Data On Every Jun 23, 2020 Google Chrome Can Now Clean Up Flash's Cookie Mess Apr 26, 2011 Delete Flash Cookies - OS X Daily

Mar 16, 2011

Auto delete Flash cookies in Internet Explorer Inability to delete flash cookies from web browser’s delete cookies settings was always considered privacy concern. Adobe has finally addressdc this with release of Adobe Flash Player 10.3 beta. Necessary changes have been made in 10.3 version of Flash Player to allow users to delete Flash cookies from web browser itself. Delete browsing, search and download history on Firefox

Clear, enable, and manage cookies in Chrome - Computer - Cleaning Flash cookies