@behrouz1 ,
I cannot see what’s going wrong. It all works perfectly when I set things up for myself, as decribed in the conversation above. My guess is there’s been a miscommunication or misunderstanding at some point.
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Here is a zip archive of a portable 8.9.6.4 set in Dark Mode:
(http://pryrt.com/nppxml/npp8964_dark_md.zip). The zipfile will only be there for a few days, then I will delete this link.
Download it. Look at the mentioned files and filestructure. Compare what’s wrong in yours compared to this working example.