This version is for evaluation & testing.
First you can/should register & use this tools then get official-release. The official-release version is certification after testing, because the serial & confirmed number will be used on that released version. If you no register that mean is evaluation status for your using, the tools will show the register form to hint you that input the number frequently each 20-30 minutes. During evaluation some functions are limited.
Be caution, the evaluation of document is always opened while distribution to someone. If you use evaluation version to build this documents and send to somebody. This file will be no data lock. If you use registered version to build and distribute. This file will be locked and it need confirmed code. After confirmed code to ensure the document right, you can open this internal contents of this document.
[Reference from http://www2.epoffice.org]