According to this announcement, the new version includes:
+ Full support for Firefox (history and bookmarks indexing)
+ Support for the latest PDF file format (v1.5)
+ A redesigned user interface for Web searching
+ Improved handling of French, German, Spanish and Italian content
You can read our positive review of Copernic Desktop Search in SearchDay article: A New Player in Desktop Search.
Mamma.com recently announced plans to acquire Copernic.
Optimising Digital Marketing Campaigns with Search, Social and Analytics
At SES London (9-11 Feb) you'll get an overview of the latest tools, tips, and tactics in Paid, Owned, Earned, Integrated Media and Business Intelligence to streamline your marketing campaigns in 2015. Register by 31 October to take advantage of Early Bird Rates.