SmartBackup has an include and exclude list to specify certain wildcards or partial names. With this list it is possible to left out certain filetypes (e.g. temporary files) or files as well as to include them, which means to copy only these files and no others.

Enter your patterns in the field above the 'Add' button. These patterns will be added to the list when you click on 'Add'.
If you select an existing pattern from the list and hit the 'Remove' button, it will be removed.
Currently it is only possible to set either includes or excludes for one backup; it is not possible to set both simultaneously!