Xilinx periodically releases patches for Vivado to fix bugs, improve performance, and enhance features. These patches are usually provided to registered users with a valid license. The license library (lic) is a critical component of the Vivado software, which verifies the authenticity and validity of the license.
When Vivado or its associated tools (like Vitis or the Vivado Simulator) launch, they perform a series of checks: Vivado Xilinx Patch License Lib Crack Hit