Problems with Extension Manager

I am having problems with uninstalling old versions of my extensions and installing the newest versions. Every time I make an attempt, Extension Manager tells me that Dreamweaver CS3 is using a file, and that I need to close it down and hit Retry or Cancel the uninstall. The problem being that I don't have Dreamweaver CS3 open. I've even gone so far as to check my Windows Task Manager to make sure it is not loaded. The only Adobe product open is the Extension Manager.

When I do manage to succeed with uninstalling an extension and installing the new version, Extension Manager seems to take over my memory so that I have to shut it down and restart to go on to the next one.

I am looking for suggestions to make these installations work. Is there an easier way to uninstall the extensions without the manager?

Note: I do not have problems installing brand new extensions. I do not have problems using the extensions in Dreamweaver CS3 once I do manage to install them.

Any help would be welcome. Thank you.