there's a free soft called soundcontrol, it probably can't use your dial but can control the volume via keyboard for example:
winkey + up (or down)
if that's not good enough why not email the makers of your keyboard/software and ask them for a change. You are the customer after all, and that would probably be very easy for them to implement.
you might also look into "hacking" the registry or the ini files for this, but not using this keybaord/soft you'll have to try that on your own