I would like to use this library as external library in my commercial closed-source application. On this page, the project is under the GPL and(!) the LGPL (the LGPL would permit me to use it). When I installed the project, it only shows me the GPL in the license agreement. So my question is: Can I use this library for my commercial closed-source application?
I won´t like to open a discussion about open and closed-source! I really like open-source, but at my work I must needs do it closed-source!