is this programm also free for commercial use?
yes it is free for any use.
For this program you have to invest some time how it works, for a computer noob the are easier commercial program's.
Nec the program is licensed under the GPL license. As long as you just use the program everything is fine even in a commercial environment. If you start modifying it or making it part of your product there are however restrictions. It must stay free, the license must stay the same and the source code (including your modifications must be published and shipped). You can find a lot of more information here: http://www.gnu.org/licenses/gpl-faq.html The GPL is a standard license used in many open source projects.
Hope this helps
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