It can be encrypted as you said, but it can also mean that whole game engine has been updated and version of the assets has changed as well.

What is "mvau editor"?

Can you upload some texture samples?

Your samples are compressed, so first you need to use tinke to decompress and extract fonts https://github.com/pleonex/tinke Then you can use one of the available NFTR font editors https://gbatemp.net/threads/release-nintyfont-nintendo-binary-font-editor.580891/ https://gbatemp.net/download/nftredit...

How do I get the key to the game I want?

There are some sites/forums that are gathering such keys.
One of them is listed in the "See Also" section on the wiki.

You can always try any other program\script listed in this article
http://wiki.xentax.com/index.php/Unreal_Engine_4_PAK

Also, if your PAK file is encrypted, you have to specify correct key in the extract command.

Maybe info from this topic will help you a little
viewtopic.php?f=18&t=10332

How am I supposed to write these letters in my own language? You can't. But you can replace already existing characters. For example go to letter "À" and replace it wth letter "Ż" (this is example for polish language). And on the end you should get similar mapping https://i.imgu...

the software just gets closed. And Crash. Well, that's an issue on your side. Try to install .NET framework as this is C# program and it may help with this issue. https://www.google.com/search?q=.NET+framework+4+download If that won't help, you can always report an issue on github https://github.co...

I've just noticed that I have answered similar question last year
viewtopic.php?f=35&t=22286

So the tool I've mentioned there is also working with your samples
https://i.imgur.com/pMUXQUS.png
And you can use it to edit fonts.

Hi, can you upload some sample files?

No, I haven't. If those are the archives, you can ask about them in the separate topic in the archives section.

If you don't mind, can you explain with pictures in your spare time? Sure, here you go: 1. Download OmegaT https://omegat.org/download 2. Go to Project > New https://i.imgur.com/fNQl1mr.png 3. Copy "Localization.txt" to "source" folder in your project location. 4. Go to Project ...

Well, you can do what you want in few steps: 1. Change file extension from TXT to CSV 2. Open CSV in Notepad++ and raplace all tabs with semicolons "\t" --> ";" (or just select tab as delimeter in the next step) 3. Load data in excel as it is in this tutorial https://www.unisende...

Hi, it seems that it is standard Unity 5 assets archive (version 17) http://wiki.xentax.com/index.php/Unity_Assets

You can edit it with UnityEx or with Unity Assets Explorer https://i.imgur.com/1OUEt7D.png

Did you try "Flash Decompiler Trillix"?