Keyboard navigation questions

[strangerinusall]

Hi, I set up copyparty recently and so far I am really enjoying it, but have couple of questions about navigating with keyboard.

1. In folder navigator I can use i/k keys to move up and down. Let's say I chose my folder, can I navigate to the file selection window using keyboard alone? And can I then navigate from file selection window into file edit window? My goal is simply to get into e.g. file edit window from the folder navigator.
2. Is there a way to remap certain keyboard hotkeys? (e.g. I would have preferred to have j/k instead of i/k since I am Vim user.