How to switch to NppFtp window using keyboard in notepad++?

Question

Notepad++

The idea is quite simple and I was surprised that I could not find a suitable hotkey. There is notepad++ and an always open nppftp plugin window, with which I regularly edit different files on different servers, because of which I constantly have to switch between two tabs: text editing and server files.
In one of them I select a file, in the other I edit.
And it is extremely inconvenient to twitch the mouse to select files, when it would be much faster and more convenient to do it from the keyboard. Actually, the question is, how can this be achieved?
Screenshot for clarity: i.imgur.com/5RfJNHK.png