Installation of RaidPlanner is self explanatory. Download the latest version from GitHub (https://github.com/Taracque/RaidPlanner/zipball/master) and install the Zip file using Joomla Extension Manager.
If you have trouble during the installation, you can try Install from URL. Use https://github.com/Taracque/RaidPlanner/zipball/master#.zip URL in Extension Manager’s Install from URL field.
After you have installed RaidPlanner, you have to enable User – RaidPlanner plugin in Plugin Manager.
To make RaidPlanner works, you have to enable Mootools Upgrade System plugin in Plugin Manager.