and how to do this? because otherwise I do not see the usefulness of the software
Not sure freefone actually had the audio going through the PC, just allowed you to make and receive calls from the PC.
AFAIR remember that has to do with the bluesolei bluetooth stack, which has to be configured to pipe audio through pc speakers. FreeFone just activates the corresponding port.
If you can receive and make calls FreeFone should be fine. Check your bluetooth audio settings for a virtual com port and put this in the FreeFone config.
Although I think that there's a more recent and compatible phone plugin than FreeFone in the plugins section. As FreeFone hasn't been updated for a long time I'd save me the hassle with FreeFone and invest my energy in the other more recent plugin.
Exactly. Former broadcomm (if I remember correctly) now called bluesoleil driver is required in any case.