macOS
If you followed the instructions on the "Download and install" page, simply double-click the Apache Directory Studio application located in your Applications folder.
Linux
After installing the Apache Directory Studio in a directory, you can start Apache Directory Studio by running the ApacheDirectoryStudio executable included with the release.
Windows
If you followed the instructions on the "Download and install" page, simply click on the Apache Directory Studio executable in the Apache Directory Studio folder located in the All programs item of the Start menu.