How do I rollback a WordPress plugin?

If you have upgraded a plugin and you have encountered unexpected results it is possible to downgrade it.  If the plugin has not made significant database changes, these are the steps you can take to downgrade it:

  1. Disable the plugin.
  2. Download and extract the old version of the plugin from the plugin repository.
  3. Log on to your server with FTP.
  4. Upload the old plugin directory to wp-content/plugins/. (Remove newer version first)
  5. Reactivate the plugin