Thanks for the tip, it worked for me.
However, having to set a new environment variable is a messy scramble of a fix on the behalf of Adobe. How on earth was such a glaring error missed on release? You should properly test your software on Windows in the future, Mr Adobe. You might find you have quite a few non-Mac users who aren't so happy with having to screw around with operating system variables to make a £50pcm subscription work properly.