I would like to see which files have changed between the latest commit and the selected commit. I can do it in the command line like so:
git diff --name-only 1f507b3cad799cff52a18ec9c132e25c0c4c21da
Open SmartGit's Log and select both commits in the Commits graph. Reveal Commit and Compare with Selected Commit actions from the Branches context menu may be helpful here. The files which are different will be displayed in the Files view and you may investigate individual file changes by selecting a file there and checking the Changes view.