Hotsauze

Hi guys, I'm running OSX El Capitan and just recently got the M65 mouse. Downloaded beta v0.2.3. Everything works OK except the Back (4) and Forward (5) doesn't seem to work when browsing Safari or Chrome. It is binded correctly but it just doesn't do anything. Is anyone else having the same issues? Would really appreciate a solution. Also is there a way to integrate mouse gesture into the key bindings? Thank you.