That BearShare premium is a completely different product derived from the
defunct iMesh software, and has nothing in common with the original BearShare.

All the "Premium" thing will give you is tightly controlled access to DRM infested
tracks on a proprietary non-gnutella network which could stop playing without
notice or hope of a refund.

Your best bet right now is the last trusted beta of BS 5.1.0, which was actually
more powerful than Pro. Get it from this thread: BearShare has been sabotaged.