During the evaluation, all features are fully functional.  No features are missing or crippled. 

To try ClipBox, just download and install the program.  You get full use of the program for 30 days.

You can convert the evaluation version to the fully-registered version at any time during (or after) the 30-day .evaluation by purchasing a license for continued use of the program.  Upon registering, you would receive an e-mail with a key that you enter into the program, which converts it to fully-registered mode, hiding the "buy now" buttons, and enabling operation past the 30-day point. 

Is It Safe?

Yes, it is 100% secure.

What is Shareware?

Shareware is a marketing method by which the author offers the software for an evaluation period, usually 15-30 days.  At the end of the evaluation period, the user must either purchase a license for continued use, or un-install the software.  Many companies, large and small, use the shareware concept to market their software directly to the end user, using various terms like Trial, Evaluation, Demo, and Shareware.