This patch seems to work, but

when invoked it tries to write to /usr/local/lib/python3.0/lib2to3
( I get 
root: Writing failed:[Errno 13] Permission denied: '/usr/local/lib/
python3.0/lib2to3/PatternGrammar3.0.0.beta.1.pickle'
)

I hope this will be handled during install in future.

Furthermore, as a test, I copied refactor.py to xxx.py
and ran 2to3 on xxx.py

Here I get
RefactoringTool: Can't parse xxx.py: ParseError: bad input: type=22, 
value='=', context=('', (67, 71))

This error message is a bit terse for someone not knowing the details
of 2to3

Thanks for the patch,
Helmut.