hey Plumber1 greetings..
welcome to Subsim
Did you keep the mod zip file? if yes you delete sh3.exe from your installation..
then you go to your anti virus you deactivate it... then you go to your download mod zip.. you extract it again in your install..do not activate your antivirus when you play otherwise it will will detect again..
you don't need to patch 4go it's already there..read the doc thank you