This is not a magical plugin that can simply remove unused options. It requires some patience and following instructions to get best results. If you expect one click removal of unused options, please don’t buy this plugin.
Smart Options Optimizer is a unique plugin that is created for a purpose of tracing unused options and meta records. When a plugin or theme is removed from WordPress, there are traces remaining in the database. Some of the records left by these plugins take space and can even have negative impact on WordPress performance and memory usage.