Butler will automatically copy your configuration and search engines from Another Launcher. If you also want it to inherit some of Another Launcher's preferences, follow the following steps before you launch Butler for the first time.
1. Go to the folder "/Users/(you)/Library/Preferences/".
2. In this folder, locate the file "de.petermaurer.Another Launcher.plist" and make a copy of it.
3. Rename the copy to "de.petermaurer.Butler.plist".
The path to the file you just created should be "/Users/(you)/Library/Preferences/de.petermaurer.Butler.plist". You can launch Butler now.