You can use Buster.JS 0.6.12 on Windows right now.
Best way is to install Buster.JS globally:
npm install -g buster
After installation i recommend to invest little effort to apply
that patch. This allows you to specify pathes with more than one path separator. If you don't need that feature, you don't need to apply that patch.
Open the following directory (<User> has to be replaced with your user name):
C:\Users\<User>\AppData\Roaming\npm\node_modules\buster
That directory contains the globally installed version of Buster.JS. Edit the following files and make the change corresponding to the patch.
./node_modules/buster-server-cli/node_modules/buster-cli/node_modules/buster-configuration/node_modules/ramp-resources/lib/resource.js
./node_modules/buster-server-cli/node_modules/ramp-resources/lib/resource.js
./node_modules/buster-static/node_modules/ramp-resources/lib/resource.js
./node_modules/buster-test-cli/node_modules/buster-cli/node_modules/buster-configuration/node_modules/ramp-resources/lib/resource.js
./node_modules/buster-test-cli/node_modules/ramp/node_modules/ramp-resources/lib/resource.js