Best answer by shorTcircuiT
Then do the same thing for Opera, make IT the 'always use by default' and try to get things working in Opera.
Then, since a majority of the files are for the autocad, and I assume you are using the cad program quite a bit, do the same thing to return the extension to be owned by it.
You will probably want to keep an eye out for updates to the extensions to make sure they continue to update automatcially as they are supposed to, as it is possible you will have to repeat the process with each new extension version, but fortunately the Webroot extensions do not get updated terribly often.
it sounds like a hassle, but really it only takes a few moments to go through it all.
Let me know what you think, or if it works :)