If you are using a registered copy of WinZip Self-Extractor, you do not need any additional license in order to distribute the self-extracting Zip files you create. The license requirements for the software in the self-extracting Zip files you create, though, is your responsibility.
In regards to usage, the WinZip Self-Extractor Registered License states:
|If you have purchased a single-user license you have the right to install and use a single copy of WinZip Self-Extractor on one computer or workstation. If you have purchased a multi-user license and received a valid registration file or code, you or your organization have the right to install a copy of WinZip Self-Extractor on multiple computers up to the number of "Licensed Copies" that you have acquired, as indicated in the documents issued by WinZip Computing when granting the License.|
Here is the section of the license that specifically addresses distribution of the self-extracting Zip files you create:
|WinZip Self-Extractor may be used to create an unlimited number of freely distributable, royalty-free self-extracting Zip files. Each self-extracting Zip file contains, among other things, a portion of WinZip Self-Extractor, including copyrighted software, proprietary notices, and identifying information (this portion is the "Extraction Software"). You may not alter or modify the Extraction Software, nor give anyone permission to do so.|
If you have additional questions about license requirements for self-extractors, please submit a ticket to the Service Department using this form.