I just got a new laptop and when I went to install Sourcetree, I was surprised to see that the look and feel is nothing like the older version I have on my other laptop. To be honest, I hate it. The colorful icons used in the older version were very helpful to me. This new version makes things much more difficult to use. How can I reset the look and feel to the older version or at least find other themes to use in Sourcetree without having to revert back to an older version?