The Plug-ins list is opened from the main menu [Plug-ins]-[Installed Plugins].
Plugins can be downloaded from here .
In order to install Plug-ins, use one of the following methods. You need to restart Astah after installation to use the installed Plug-in.
Drag and drop the Plug-in file into the Astah window.
Click [Install] button in Plugins List and select the target Plug-in’s jar file.
In order to uninstall Plug-ins, select the Plug-in from the list and then click [Uninstall] button.