Choose your version (latest is better) and download it here
Just unzip and run the exe. All dependencies (SSL & Qt) are packaged inside the zip file.
If you have any issues about missing DLL, first try to install Microsoft VisualC runtime (vc_redist x64). If it doesn't help, please open an Issue
Have a look at the doc now !
Here are the guidelines to compile YAOG and OpenSSL on your own : compile