I have never done this, but apparently its required to install the memberlist hack.
So just wanted to make sure what, if any, is the risk involved. I have close to 9500 members and is there any chance of screwing up something somewhere by clicking that button in CP?
Do I need to backup something to be safe? If so, what? (I mean 9500 members file backing up is quite a task even over a 56k DSL that I use!)