CS6 unable to un-install an extension

Question

I wanted to upgrade a Dreamweaver Extension  to a newer version.
(Extension: WebAssist Databridge on Windows Vista - Dreamweaver CS6 in CS6 Design Premium)
First I tried to uninstall the existing version (v.1.1.2) using Extension Manager.
After waiting for more than an hour I aborted the process using Windows Task Manager.
I then installed the new version (v.1.1.3)
However, I'm now in a muddle because both versions seem to be showing on in Extension Manager (via Manage Sets) - but I'm unable to remove either:
Outside of Manage Sets I just see the old version - with Enabled unchecked and a yellow triangle showing. The mouse-over message with the triangle is 'Extension status is not consistent with extension set configuration)
When I try to remove either I get the message 'The specified extension 'WADataBridge.mxi' is not installed'.
When I click OK in the message box - I just get returned to Extension Manager.
When I click 'Manage Sets' both versions are listed - but Delete is greyed out - All that is available is Duplicate Import and Export.
Can anyone explain how I can un-install these extensions? (to enable me to install the latest version properly)

Answer 1

Thanks Carl. To resolve the problem I uninstalled 'Desigh and Web Premium CS6' and re-installed. This allowed me to sucessfully install the extension.
Of course the real problem here was the amount of time it took to un-install the extension - Web Assist Support thought that Norton Internet Security might be to blame.
If I get the problem again, perhaps I'll try your suggestion above - although I noticed that InDesign seems to install numerous extensions - which might be at risk using this approach?.
Many Thanks