Wow, yes. My fault, I had an error in uv5r.py import section.
It definately doesnt work for either installer or zip build. What is strange is that it seems to work fine for mercurial version on windows and linux. Go figure..
error in debug.log:
Traceback (most recent call last):
File "chirpw", line 123, in <module>
File "chirp\uv5r.pyo", line 20, in <module>
ImportError: cannot import name os
here is the patch to fix: