While I am very happy with all the features the ProtonVPN Windows desktop version offers, one major drawback for me is that I cannot use it without a mouse.

Quickly cycling through all the buttons using the tab key does not work, or at least not in an intuitive/convenient way. Getting this to work reliably would be very useful for keyboard-oriented users. Keyboard shortcuts within the app would be extremely helpful (maybe even configurable shortcuts, like F1...F12, for directly connecting to the custom profiles).