The easiest way to install Simple History is to install it inside your WordPress installation:

1. Login to your WordPress admin page.
2. Go to “Plugins” and click “Add new”.
3. Search for “Simple History”
4. Click install and then activate.

Other ways to install Simple History:

• Download the plugin from wordpress.org
• install it manually using the plugin ZIP-file.

If you need more help the the WordPress codex has some more help on how to install plugins. You can also get help at the support forum.