@Ultwa Open "OpenIV", then drag-and-drop the oiv onto its window, a new window should appear, which is the install window for the mod. It's totally unnecessary to try opening oiv files any other ways.

@JohnFromGWN Can you guide me trough how can I install clothes with "mpclothes"? 🆘 I tried installing just a pants as a first test to understand how it works, but that model is nowhere to be found in-game. I want to install clothes for the customisable male and female player characters only, but absolutely no luck so far. ☹

@iammistahwolf Okay, I'm re-enabled "mpclothes". Still no game crash, just I'm struggling to get clothes properly installed.
Are you using "mpclothes"? If yes, can you show me how you installed your clothes?

@iammistahwolf So, I'm eliminated every DLC from the list with "g9ec" in their name, except "patchday27g9ec" as you wrote. Well...

• with "Enhanced Native Trainer", the last shirt/jacket slot is 439
• in a clothing shop with "character creation script", the last shirt/jacket (upper body) slot is 438
  So, no game crash anymore! 👍
  ❔ But can I reinstall "mpclothes" DLC to use downloaded clothes? 🤔

@JohnFromGWN Well, I redone most of my addons, too, and these are the results:

• "upper body" (shirt) slots 440 and up ‒ instant game crash
• "shoes" slot 113 ‒ instant game crash
  Can you explain what can be the cause? 🤔

@JohnFromGWN I removed the "mpg9ec" DLC as you wrote and...
At first it seemed it worked, I was happy, but the game still crashed as before at another slot. 😑 Ouch...

I'm also removed "mpclothes" addon, but it still crashes...

@JohnFromGWN So, if I remove that DLC, manually installed clothing items won't cause any more problems? 🤔 That would be good...

@JohnFromGWN Can you summarise what was the solution there? What's that "'g9ec' crap" that user mentioning?