Git configuration not working for custom text editor

[paolo de luca]

I've installed sourcetree from scratch and I've been asked which texteditor I wanted to use.
I choose Notepad++ but it doesn't work.

Moreover it still not works after I set it up from command line

Following is from git config --system (created during installation)

core.editor="C:\\Program Files\\Notepad++\\notepad++.exe" -multiInst -notabbar -nosession -noPlugin

Following is from git config --global (created by me)

core.editor="C:\\Program Files\\Notepad++\\notepad++.exe" -multiInst -notabbar -nosession -noPlugin

Sourcetree version 3.4.9

Windows 10