The problem is that Flash cookies are stored in binary format, not text files like normal cookies, so you’ll have to find / wait for someone to write a program that can read/write them (which may not happen if the format is proprietary, and would thus take longer since someone would have to reverse-engineer it).

That said, Nirsoft’s FlashCookiesView lets you at least view and delete Flash cookies. Some cookies cannot be read, but FlashCookiesView allows you to at least view the cookie’s in a build-in hex-editor.

Ghostery can be set to delete flash cookies on close.

If someone like me goes here, there's soleditor to edit flash cookies: