I have tried out bzr-2.5.1-1-setup as well as bzr-2.6b1-1-setup.
Also I set the variable: BZR_SSH to C:\Program Files (x86)\putty\PLINK.EXE (here is the putty software located).
I always get the message: Unrecognised value for BZR_SSH environment variable: c:\Program Files (x86)\putty\PLINK.EXE
What could be the problem?