Visit archive.org and search for CSR Harmony 2.1.63.0 . Many old official CSR FTP directories were archived in 2011–2013.
Before downloading and installing this software, users should note the following compatibility guidelines: Csr Harmony Wireless Software Stack 2.1.63.0 Download 15
: You may see CsrHCRPServer.exe running in your task manager; this is a legitimate component used for managing Bluetooth communication. CSR Harmony (Bluetooth Apt-X) Software and Drivers Details Visit archive