The library the toolkit is based on is called HElib and the developers (myself included) did not have the bandwidth to port anything to Windows. The core library and dependencies are Linux native. As it is, we are a bit behind on the Linux and android toolkits. With limited time and energy, we chose the most closely related platforms that all have Unix like underpinnings. Thanks for the question! If you have more feel free to join in the public slack conversation:

https://fhekit.slack.com/join/shared_invite/zt-e35rax8l-_ZbB...