Inside of your Wordpress admin area, you'll need to visit the Plugins » Add New page.
Type "RaiseDonors" into the search bar and the plugin will appear in the search results and click the ‘Install Now’ button next to it.
WordPress will download and install the plugin for you. When this is complete, the ‘Install Now’ button will change into the ‘Activate’ button. A plugin will not work until you activate it—so go ahead and click on the activate button to start using the plugin.
Uninstall the RaiseDonors plugin
You can uninstall the plugin by going to the Plugins page in the WordPress admin area.
You’ll first need to deactivate it.
After that, you can simply click on the delete link to remove it from your website.