I am not sure why but enabling this plugin now forces a server restart. Having it loaded and not enabled does nothing, however turning it on with these in the cfg
sm_crits_enabled 1
sm_crits_chance 1.00
will cause it to restart the server after a weapon is fired.
I am using this to take its place and it is working fine
https://forums.alliedmods.net/showthread.php?t=188551