Oh help! DT 4.0 won't start after trying insider build (sorta solved!)

There is still a darktable process running in the background. US e the task manager to kill it, then you can restart

I don’t think storing the config directory under C:Program Files is a good idea. Normally, users should place their files under C:\Users\<userName>.
What happens if you change your batch file to --configdir "%USERPROFILE%\DtDevConfig" (also, your post used typographic quotes (“) instead of straight quotes (") → those should be straight quotes.

Alternatively, for an even more Windows-standard solution, use %APPDATA% instead of %USERPROFILE%.

Either way, at the command line, create the DtDevConfig directory. Either
mkdir "%USERPROFILE%\DtDevConfig" or mkdir "%APPDATA%\DtDevConfig".

Then use the same variable in your .bat file.

Let me know if that changes anything.

Many thanks for your help folks
Finally got it to work with this combination:

.\bin\darktable --configdir “C:\Users\Username\Documents\config”

Not sure why, but it works!

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Probably because writing to C:\Program Files requires extra permissions.

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Makes sense…