Default Documents folder still being use even though changed

Question

"Computer\HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders\Personal" has been changed to "D:\Users[user]\OneDrive\Documents", so has the "Documents Properties" and all works well, even OneDrive is correctly syncing. However some programs (including Unreal Engine) is still using "C:\Users[user]\Documents"

Is there any way to fix this or has Epic and otehrs just hard-coded the location instead of using correct standards for Windows?

Edit: Also when starting CMD it defaults to "C:\Users[user]\Documents" instead of the correct D: version.

Answer 1

Created a junction using "junction64.exe" v1.07 from Microsoft. https://docs.microsoft.com/en-gb/sysinternals/downloads/junction

In elevated command prompt I used the following commands:

del "C:\Users[user]\Documents"
junction64 "C:\Users[user]\Documents" "D:\Users[user]\OneDrive\Documents"

Answer 2

You need to edit the values under:

Computer\HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders

In addition to the value named 'Personal', if a value named '{f42ee2d3-909f-4907-8871-4c22fc0bf756}' exists, set that to your desired 'Documents' path as well.

For the Command Prompt, you need to edit the properties of the shortcut that launch Command Prompt.

1. In the Explorer Address bar, type: shell:programs
2. Open the Windows System folder
3. Right-click Command Prompt & select Properties
4. Edit the Start in: value (or the underlying environmental variables)