I have a simple question i have many racing sims rFactor Richrds burn Rally GtR2 and LFS and i wondered if the logitech profiler was a tool that is improtant cuz when you close it it says that the wheel wont work properly ???
If it is important how do i use it thanks.

Its not that important, if you havn't got any commands mapped to it. Such as having the "B" key mapped to say...The left paddle.

My G25 works fine without the profiler, but i always keep it on just to be on the safe side.