I have recently had to perform a clean install for Windows 10 and had to reinstall Sourcetree (using SourceTreeSetup-3.3.6 download). When I select the download it starts running the Sourcetree program, but does not install it on my computer. It does not copy the software to the program files directory nor add it as a listing in the start menu so that I can restart it. The only way I can get back into the program is to click on the setup file again. How do I get a proper install for Sourcetree?