1. What's the difference between the trial version and the registered version
of the program?

A: There is no functional difference between the trial version and the full version. The
　only limitation of trial version is conversion time limitation: the maximum5minutes
　conversion of a more than 5 minutes file and with a less than 5 minutes file, you
　could only convert half of it.
　As our registered users it will no conversion time limitation, you will be entitled to
　get the free upgrade within a certain version and receive the full technical support
　from us. Also, we provide special disounts for our customers.

2. How shall I know the version of my product at present?

A: You can get the current version of your product as follows: to choose "about" from
　 "help" dropdown menu, the version is at the The lower right corner, the interface
　 will be closed by click itself anywhere.

3. How to upgrade?

A: You just need to re-download the program from our official site and input your
　 registration code, it is ok.