Game modded - When actually not?

[CptVodka]

So, me and a friend has been playing together for the past week.
We've had no problems, until now.
It said that we had different game versions. So naturally, we tried disabling all the mods that we ran (used a collection to have the same mods).

After disabling the mods, it still doesn't work.
His game says (modded) by his version number, while mine doesn't. I read online that you should delete the launcher-folder in appdata/roaming/The creative assembly.
We both did that.
His game still says (modded).

It all worked fine yesterday evening. Today, after the update this error occured.

[CptVodka]

Update:
He's tried;
* Unsubscribing to every mod
* Deleting every mod from workshop-folder in steamapps
* Deleted the folder Launcher in %appdata%
* Deactivated all DLC's
* Validated steamfiles (1 was corrupted, and successfully downloaded)

He found this in his "modified" text file in %appdata%warhammer2;
settlementtimedown.pack unknown file
settlementtimedown.png unknown file

How do you remove that?

Edit: apparently he can see the "settlementtimedown" in his modlist in the launcher, however he can't remove it as to his surprise, he is the author of the mod. Which he surely isn't :D

[Artillery Horse]

The last update has screwed up the launcher and some mods. Verified files and then clean start after reboot, I am getting this stupid message: Game instance already running, this game instance will terminate". I close that window and the game starts, wtf, lol.