Behavior Files both define the function

On opening Dreamweaver I'm getting the following errors:
The behavior files "WA Set FormCookie" and "WA Set FormCookie" both define the function "WA_setFormCookie". "WA Set FormCookie" will be ignored. The behavior files "WA Set Cookie" and "WA Set Cookie" both define the function "WA_setCookie". "WA Set Cookie" will be ignored. etc.

I've tried to search the forums for this error, but I get no results (doesn't like the word both or the), so I apologize if this has been already addressed.

it sounds like you may have both Cookies toolkit and Security Assist 2 installed, security assist 2 includes cookies toolkit, so it should not be installed at the same time.

see this thread for details on which extensions contain others:
showthread.php?t=24005

So then I uninstall cookies toolkit 3.1.3?

yes, uninstall Cookies Toolkit, and uninstall Security Assist 2, then reinstall Security Assist2.

That seems to have done it. Thanks!