From the developer: "Files Search Assistant includes special 'Preview' pane, which was designed to save user form routine job. You can search for some text in different documents using regular expressions and Files Search Assistant will show you a small piece of found file with your keyword (marked as a bold text). Navigation buttons allow you to navigate through search result in a handy manner.

"There are some features, which make Files Search Assistant especially useful. This utility provides you with custom search options, where you can setup your preferable search settings, such as folders to search in and files to search for."