3 minutes ago, SuperStumpje said:

Actually, that will cause problems. RAGE Plugin Hook will always use the files from the folder called 'Grand Theft Auto V'. Any other name and it will not work properly.

Interesting. I did run a test before posting using a bare bones copy of GTA V & RPH and it worked for me. 

Perhaps that's just OP's problem. 

so what should I do?

Try renaming your 'GTA V' folder to Grand Theft Auto V.

is already. still not working

10 minutes ago, Constable Lego said:

Excellent. Could you just navigate to update > x64 > dlcpacks and tell me what patchday number you have up to. 

Could you do this for me?

for what?

In OpenIV go update > x64 > dlcpacks. 

Wait a second, you have retail version right?
Have you launched the game? There is a mandatory 5GBs update to download as well as the extra 5-10GBs to get the latest updates.
(In case anybody want's to know how I knew that, GTA5.exe is not present, as well as personal experience.)