Controls? Save file management?

[Hawke]

Are the keyboard and mouse controls rebindable? Are 5-button mice supported?
Edit. The controls seem to be rebindable: https://steamcommunity.com/app/1721060/discussions/0/4701287772393067654/#c4701287772393181121

How does the game save progress? The Souls-like tag suggests that I would have to use Windows Explorer for the save file management.