Thanks and a couple of questions

Hello, I really want to thank you for a very convenient and simple program! And a special thank you for translating the interface into Russian!

I added a program to my site about free software (gnu gpl, bsd, mit), link.

Is it possible to implement the button “about the program” in the program itself, in which to write a website and a license, on which the program is distributed?

Explain please, in the settings of the store there is an item in which the “WebDAV Port” is specified, it specifies the URL address. How to use it and why? is it like a local web server for browsing files over the network? or how?