@Reacon unfortunately, what you're doing will not work with the retail version. Steam uses a third party to update its games. Once the update has been completed, Thats it. it will NOT re update after you've replaced the game files with your backed up game files.
I unfortunately have the retail version and i do not know of a way to bypass the social club launcher. I dont want to really try either as i might update my backup lol. i could try disconnecting my ethernet cable, but im just being patient for now.

For all of you that have the steam version, you can still play with mods if you have a back up.

@krissboo
I wanted to shed some light on a GTX 1070 as I have one.
I honestly feel like you should go 1080 or 1080TI.

With mods added on, I can still get between 40-60 FPS, however, it can sometimes drop to 30, even 25 at highly intense moments.

I have a GTX 1070, I7 7700K, and 16GB's of RAM. No overclock.
I have like 30 add on cars, and natural vision remastered+ENB.

I thought I would for sure be getting 60FPS constant with maybe drops into 45-50.

This is not the case. The game runs extra smooth when running vanilla however. I never even drop to 55. This is with MAX settings (except extra distance scaling is half, and population variety at 75% and density at 75%)

Any game will run at 60 FPS/1080P if not modded it seems.

Hope I aided in your decision.

-Mo

you have to wait until scripthookV is updated. It should hopefully be out by the end of the week. You and everyone is waiting to continue playing with mods. All we can do is be patient. I actually bought assasins creed orgins just to pass the time lol

@cgec29 I've actually abandoned merging my add ons as of right now, and ive found a temporary gameconfig fix that worked for me, I was getting stuck at 11 cars, now I have 15 and im gonna add more.

Look for this in your gameconfig:
<PoolName>Vehicles</PoolName>
<PoolSize value="300"/>

Change the value to 600.

I did this yesterday and it worked.

Let me know if this works for you.

@ikt hey I don't mean to hijack a thread but my question is very relevant the OP's post.

I too have the same problem as cgec29, and I've actually tried to make my own DLC pack. I can spawn a vehicle, but my game crashes if I try to enter it. From lots of research on the forum, ive concluded it has something to do with vehiclelayouts.meta. Ive tried to put that file in the corresponding location of the original dlc, but I cant enter my car and it still crashes.
Any help is appreciated.

To the OP: the tutorial I followed to add DLC cars is : https://forums.gta5-mods.com/topic/222/tutorial-vehicles-weapons-how-to-do-add-on-s-replacer-s

I really wish there was a video tutorial.

Let me know if you've gotten it to work!

I've had a similar problem with Simple trainer, but it I rechecked the Dlclist, and it turns out it was a bit off. istead of "<Item>" , the "I" was lower case , like this "<item>". I changed it to capital and make sure it all matched and it started working.

Have you replaced the gameconfig file?