I have the older Jetson TK1 board but all the software downloads for L4T Release 23.1 and JetPack only reference the new Jetson TX1 kit. There is a section for TK1 but only hardware documents.
JetPack 2.0 also downloads & installs the latest for Jetson TK1, including VisionWorks and more. The L4T that JetPack currently flashes on Jetson TK1 is R21.4. If you’d prefer to install manually, you can run JetPack and it will download the various packages for you, under a subdirectory where JetPack is located.
Thanks. I found the link for R21.4 and was able to flash manually.