Download something with a lot of sources that usually moves fast.
If none of the sources run freely at well over 64K, you are being throttled.
As you have Pro, the limit may not have been applied to you.

You can get the latest beta in the thread "BearShare has been sabotaged"
right above this one. It was compiled with more generous upper limits than
Pro, like 50 connections per download. Don't forget you need BearStart to
bypass the expiry date.