As part of our app renaming/re-branding - Database File Explorer is now known as Database Space Explorer. The main reason is that this product, which started being very focused on the file/filegroup usage is expanding to many other database-space related stats.
With that being said, we encourage you to try out the latest version of the app - there are many new features, fixes and enhancements. For example - A "Table Popularity" view which lists table by their connection and references to/by other objects. This provides another easy way to explore large databases.
Here's a screenshot: