Cannot get fresh install to work on Windows 7

Created by: Kazark

I installed clink, then cloned the repository and called install.py. I added C:/Users/xxxxx/AppData\Local\autojump\bin to my path environment variable in my Powershell profile and launched a new instance of Powershell. The command was recognized but I am unable to jump to any directory. No matter what I do, I get an error message:

> j C:\github
autojump: directory C:\github not found
try `autojump --help` for more information

I also tried this in cmd, with the same results. Have I missed something here in my install?