This release fixes several issues on Windows causing the first run ("install into PATH") to run on every invocation. Additionally, it fixes an issues with upgrades.
Note: if upgrading from 0.3.x on Windows, it may fail, in which case upgrade manually. It may also cause a Command prompt window to open (temporarily), and fail to run the requested command. If the command window persists, close it, and the upgrade will be finished successfully — just run the command again.