Thanks. But I'm still not able reproduce the issue using the same configuration you are using.
Can you please send me a screen shot of the settings you have specified in the Configure Link Settings so we are running the same test.
Also, try deleting the configuration folder at:
C:\Users\<your user>\AppData\Roaming\Adobe\Dreamweaver CS5\en_US
and reinstall the extension and see if that fixes the issue.