I never learnt how to use a subversion. Tinyau recommended me to use TortoiseSVN as svn client for Windows platform so I checked out latest version 716 from here to have a play with it.
Then I found what I've missed in recent weeks on Habari development. There were substantial changes to the core that this theme doesn't work on revision 716. The theme simply doesn't load and I saw only blank window without any error messages.
I have recently set up again my development environment at my home PC. I guess I'll need some time to "redesign" this theme to work with the latest subversion 716.