The ad-supported versions of 5.1.0 and earlier had the harmless and easily
removable WhenU Save! adware.
Apparently the iMesh company bought the BearShare franchise at about the
same time as the staged $30 million one-day "lawsuit" and paid the "settlement",
then promptly installed the Zango spyware in all versions, including "Lite". This
new version of BearShare starts hooking up to multiple spy sites in Florida and
Israel even as you start to install it and refuses to continue if you do not
permit the spying to continue.