We've recently made changes to how iThemes Sales Accelerator and the individual Pro modules function. Going forward, you will use the free version of the iThemes Sales Accelerator plugin available on the WordPress.org
Plugin Repository as the main (base) plugin. Then you will be able to install and active the Pro modules, such as Reporting Pro and Warehouses, as separate add-on plugins to add additional features and functionality to iThemes Sales Accelerator.
Because of this change, we have to change how the upgrade works for this latest version update.
Before you remove the Pro version of the iThemes Sales Accelerator plugin from your site, you'll want to make sure you're running version 1.0.5 of iThemes Sales Accelerator Pro.
Version 1.0.5 will keep you from having to reimport all of your sales data once you upgrade.
Once you've confirmed you're running version 1.0.5 of the iThemes Sales Accelerator Pro plugin, you can deactivate and delete the plugin from your site. You'll then install the free version of iThemes Sales Accelerator, version 1.1.
You can do install the new plugin by downloading it from the WordPress Repository or by going to Plugins > Add New and then search for iThemes Sales Accelerator.
Not sure how to install a plugin from the WordPress Repository? Check out this article for more information: Installing Plugins from the WordPress Repository
When you have installed iThemes Sales Accelerator to your site from the WordPress Repository, you can download the Reporting Pro module from your iThemes Member Panel and install and activate it on your site.
Once you have made the switch to the iThemes Sales Accelerator plugin available on the WordPress Repository, you will just keep this plugin up to date as you would any other plugin.