Each Xilinx Evaluation Kit is shipped with a device-locked DVD version of the software.
The Software version (and whether Vivado or ISE) is noted on that DVD.
This DVD can be used to install the software to begin working with the Evaluation Kit.
The latest version of the software supported by that kit can be checked on the specific Evaluation Kit Support page:
https://www.xilinx.com/products/boards-and-kits.html