Isaac G

this is for a new lcpdfr install. When I run the plugin, I get the splash screen that says that it expects version 1604 of the game, but I am running version 877. How do i go about patching my game to 877? I am not running steam, I am using the rockstar games install. Game works fine without the mod....any help would be appreciated. I could not figure out how to update the game after doing some searching. Seemed like it needs to be ran via steam.