I'm trying to change the default application that Iceweasel (Firefox as was) uses to open .pdf files. I'd like to open them with Konqueror (or anything else that lets me select and copy text from a pdf).

I understand how to change file associations in Iceweasel but I'm not at all sure where I should be navigating to, when the Choose Helper Application window appears, to find Konqueror.

Can anyone help, please? I just don't understand how the folder structures in Knoppix work.