How do I switch back to Konqueror?

I tried the same way I changed it to Mozilla but if I open a knoqueror browser
and type in a web page it responds with:

    There appears to be a configuration error.
    You have associated Konqueror with 
    text/html, but it can't handle this file type.

It handled it before... why not now? I actually just want to test it out
because I think that the graphics might be better in konquereor and I want to
verify that.
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<:-)~MIKE~(-:>