Wrong version of GTAV

Hi, I am a newbie so please be kind. I am trying to mod GTAV.

One of the steps in the video asks that you go to your steam and locate GTAV.

You then right click on it and go down to Manage and then Browse local files .

But I don't have that option ?

Mine says CD Keys , Hide this Game or Mark as Private.

Which has me wondering if I have the full version of the game.

I downloaded it through steam .

Any help would be appreciated.

Thanks for that info Cj24. Can you help me with this please.

I am following a you tube video on how to mod GTA5.

I go to GTA5 mod page and download script v but how do you download Community scriptv .net it won't download.

Any help would be appreciated. Thanks.