I don't recall I ever approved anything, somehow the Claude app associate itself with some common formats like .json, .csv, .markdown, .rtf, .docx, etc. on my Windows 10 machine, even though I already have Cursor, Notepad, New Notepad App, LibreOffice... that can handle these files and associated.
I am not sure how this happened and how would Windows (10) allowed this to happen. Regardless, I don't appreciate the move trying to become "the default" at all, considering it's a rate-limited, connection-required app that does not really allow the user to directly edit the file.