Plugins are installed by saving the .jar file to the plugins directory in your DMDirc profile. Once you have saved the .jar file to the correct folder, the plugin should be visible in the plugin list in DMDirc.

The location of your profile directory varies according to the operating system you use. Typical locations are listed below:

• Linux: ~/.DMDirc/ or ~/.config/DMDirc/
• Windows XP: C:\Documents and Settings\user\Application Data\DMDirc
• Windows Vista: C:\Users\user\AppData\Roaming\DMDirc
• Mac OS X: ~/Library/Preferences/DMDirc

You can check the location of your profile directory by opening DMDirc, selecting the 'Help' menu, clicking the 'About' item, and then selecting the 'Information' tab.