Free, Lite Version available
A free 'Lite' version of the plugin is available on WordPress.org plugin repository. No time or othe limitations, it only has less features, that's all.
Do I need the Pro version?
Check the list below to see the main differences, or you can simply try the Lite version. If you want to, you can compare the back-end to the Pro version using the Pro Back-end demo page.
The Lite and the Pro version are two separate plugins, thus you can switch from Pro to Lite and vice-versa at any time, without loosing your settings.

Lite version
- Single search instance
- Post type search only (posts, pages, products, portfolio, events and any other custom post type..)
- Vertical layout only
- Generic and Category filters only
- 4 themes, some features customizable
- Category and ID based result exclusions
Pro Version
- Multiple (unlimited) different search instances
- Post types, Taxonomy terms, Attachments, Users, BuddyPress Groups and PeepSo content as results
- Vertical, Horizontal, Isotopic and Polaroid layouts
- Post type, Generic, Content type, Taxonomy, Custom field and Date filters
- 100+ Themes, fully customizable
- Taxonomy, Tag, User, Date, ID and other result exclusion and inclusion methods
- ..and many other features, check the full features list.