That's really weird... I doubt it, but maybe somehow your config.cfg file (it contains all the binds you and ESF have set) got changed and everything was set to the turbo command.
Check that file (it's in your ESF root directory) and see if that's the case, though I don't know how in the world that could have happened.
You could also try rebinding your keys in-game.
In the console, to set movement to the WASD keys, type unbind w (to remove the turbo command) then bind w "+forward", etc.
If that doesn't work, then just try the magical reinstall, that should be less work than the latter solution anyway.