This method is the easiest to use if you are unfamiliar or uncomfortable with using an FTP program.  It also offers a secure installation. 

1. Log into your blog's admin area.
2. Deactivate the Datafeedr plugin.
   
3. Now that the plugin is deactivated, you should see a red "Delete" link.  Click the "Delete" link for the Datafeedr plugin.
   
4. Confirm the deletion of the files by clicking the "Yes, Delete these files" button.
   
5. Once the Datafeedr plugin files have been deleted, go to Plugins > Add New and use the "Upload" method. Choose the Datafeedr .zip file that you downloaded from Datafeedr.com.
   
6. Click the "Install Now" button.
7. Activate the plugin after the plugin has been installed.