Can I use the pictos in my book/software etc.?

Picto-Selector does not own the pictos, i’ve been given permission to add them to the software for free and everyone can use them for their own use. If you want to use them commercially then you should contact the owners.
You can find the websites of the owners in the “Help” > “About Picto-Selector” dialog. Please use the website information for the pictos you want to use.