Mike,
when Datheader downloads the category.txt, ldconfig.ldr, primitivescale.txt files it will download them to prog folder and obviously they end up under:
C:\Users\<username>\AppData\Local\VirtualStore
could you please look into it.
Thx, w.
Those files are downloaded to the folder that is specified in the options:
Path for lists
So it is up to you where they end

Upps! Never noticed. What is the "Path for Download"?
w.
It's the path to store LDraw files you download directly from Tracker using DatHeader (Files -> Open from PT)
You'll find it under Option -> Preferences.
In the middle of the window you're able to set:
Path for Download
Path for Lists
Ldraw Base Path
I just looked also in the documentation it is still valid for that items.
What is the default location set by the program itself - in case it sets?
w.
Yes, the application sets the values: Here is the code:
Code:
''' <summary>
''' This is the folder where the downloaded part files will be stored.
''' </summary>
''' <remarks></remarks>
Public gstrTempFolder As String = System.IO.Path.Combine(My.Computer.FileSystem.SpecialDirectories.Temp, "DATHeader")
''' <summary>
''' This is the folder where the downloaded part files will be stored.
''' </summary>
''' <remarks>NOT YET USED</remarks>
Public gstrWorkingFolder As String = My.Computer.FileSystem.SpecialDirectories.AllUsersApplicationData
''' <summary>
''' This is the folder where the app needed files are stored.
''' </summary>
''' <remarks></remarks>
Public gstrListsFolder As String = My.Application.Info.DirectoryPath