This menu item only appears, should you have uploaded any third-party tools or applications in the [[02-ibexpert:02-07-ibexpert-options-menu:environment-options#Additional Tools|Environment OptionsIBExpert Options menu]] item, Environment Options / Additional Tools, specifying the applet/application name, and the directory and file name.
The specified application appears automatically as a new menu item under Tools / External Tools:
You can use this for a quick link to any external application you may wish to use without having to leave IBExpert.