The HP programme is probably set a the default for the type of file your your wife is transferring to the laptop. Type associations into your search box then change the default programme from the HP one to whatever you want to use to save the transferred files as mp3s.
Second thought. I don't know about the Olympus dr, however, is she using the HP programme to transfer and save the files. If so why not just drag the files from the recorder to whatever folder she uses to store them on her laptop (I'm assuming you can see where they are stored on the dr on her laptop).
If you have to swallow a frog, try not to think about it. If you have to swallow two frogs, don't swallow the smaller one first.