Trial Version has many limitations:
Trial version can be distributed freely, as long as it is not sold commercially without permission from author. However, you must distribute the whole software package without any modifications. Unregistered use of this software after the evaluation period is in violation of copyright laws and may result in severe civil and criminal penalties.
Registered version
For a low price you receive a registration key that will unlock your program (and bring it as a registered version). One registered copy of this software may either be used by a single person who uses the software personally on one or more computers, or installed on a single workstation used non-simultaneously by multiple people, but not both. You are explicitly prohibited for any distribution of registered version! Any distribution of registered version is in violation of copyright laws and may result in severe civil and criminal penalties.
Warranty disclaimer
THERE IS NO WARRANTY FOR THIS PROGRAM - whatsoever. You use it "AS IS" and entirely at your risk, and author will not be liable for any damages that might occur to your computer, software, etc. in consequence of you using this program.
Thank you for understanding and honoring the "shareware" concept.