To install iThemes Sales Accelerator (Free), you will follow the usual steps for installing a plugin from the WordPress Repository.
Once you've installed and activated iThemes Sales Accelerator on your site, you will be taken to the launch page.
From here, iThemes Sales Accelerator beings to import all the information from your store to be used in your report. Depending on how many products and sales you've had on your site, the import process may take some time.
Once the import has completed, you will be taken back to the Home page of your dashboard. In the top left corner, there is a switch to turn on your iThemes Sales Accelerator dashboard.
When you turn on the Sales Accelerator Dashboard on, the Home page of your dashboard will show all of your reporting.