These "legacy" versions were popular for their simplicity but often came bundled with adware.
If you're looking for modern ways to manage music or find old files, How to to modern devices? History of other P2P giants like LimeWire or Napster? bearshare windows 7
If your goal is to download music and recapture the P2P experience on Windows 7, do not use the actual BearShare software. Use a client that connects to the (the network BearShare used) but is safe and open-source. These "legacy" versions were popular for their simplicity
: Later versions supported high-definition video playback. The Legacy of "Legal" P2P bearshare windows 7