This package is released under the version 2.1 of the GNU Lesser General
Public License.
Note that FlowDesigner also links with the GPL library FFTW. If you ship a 
binary-only FlowDesigner module, it is up to you to make sure you don't infringe 
the FFTW license, or the license of any other library that's linked by 
FlowDesigner. If you cannot do that, then you cannot distribute your binary-only
module.