After downloading the latest SourceTree and trying to install it, SourceTree will display a blank window and not display anything after a long time at 'Use an existing account'. I have to kill this and attempt to delete all files associated with %LOCALAPPDATA% under SourceTree but this does nothing for the install it still displays a blank screen. I attempted to run an old version (1.9) but i will not allow me to and still attempts to install the newest version which brings me back to the blank screen. Any ideas of how to solve this ? Thanks.