The PDF-Xchange software is free of cost, but it is not free in terms of freedom. The relevant portion of the license is (emphasis theirs)
You may use the Free version without charge provided you are the End User and do not intend to distribute or incorporate it with or into any other product or software package intended for resale or distribution for any ...
There is no Open Source licence.
see extract from definition https://opensource.org/osd
Derived Works The license must allow modifications and derived works, and must allow them to be distributed under the same terms as
the license of the original software.
However did you know that this does not mean that people have permission to edit your ...
Epsilon is a software which chose to use a license as you describe. Here is a talk about that license and the different problems it can cause:
What you are looking for would be this type of license:
I do not really see a ...
Good question, no matter if is incorrect, is a complex problem.
Point 1 and 4 are not responsibility of the license but technologies or your will.
You could Multi Licensing (https://en.wikipedia.org/wiki/Multi-licensing) - each user chooses a license according to the use.
Point 2 makes no sense since open source and non-profit are not related at all. If ...
Consulting documentation and using that documentation to create your own work does not mean you are "creating a work based on the documentation."
Let's look at the example you have asked about. The documentation explains how to use the makeStyles function of a component which you have included. The component itself, which has its own code, and its own files,...
In general, no: once you've published your idea (whether as open source or not), it becomes part of the "prior art" and is no longer eligible to be patented. Patents are for innovation, and almost by definition something can't be innovative if it's just taking someone else's idea.