I have attempted to install source tree many times on two different computers (windows) . Each time, after authenticating my account on bitbucket - and I receive the message that I may now close the window - the installation GUI freezes operation. I can not proceede via the next button and it seems that registration never completes .
The executable I downloaded from the source tree web site is 'SourceTreeSetup-3.3.8' for windows.
Also, from your website, attempting to follow the links to down load source tree for windows, the lonk appears to be broken :