Tools menu:
Properties for Current/All configuration(s):
File:
“CSV files to Detect” list:
Uncheck the item not needed.
Or,
Tools menu:
Customize: (Global settings are here.)
CSV:
“CSV Formats” list:
Delete the item not needed.
But think twice and learn some CSV features. You might find them useful someday, not only for CSV files, but also for common editing.
e.g. By using different character as CSV delimiter, you can view/align/sort/copy/edit/… a part clearly+easily:
i.ibb.co/0VbxXQb/Em-Editor-CSV-Column-Sort.png
▲ The image shows your m3u file sorted by the year, and by the sequence number.