turn off default auto hyphenation in illustrator

I tried Doug Robert's way and it still wasn't working for me so I dig more digging and found this solution. Even though this is an old thread, thought I'd post to help others. I ran into some bug because opening every single settings file from the Illustrator settings folder, changing hyphenation in the Paragraph window AND changing the hyphenation in the Paragraph styles wasn't working. I found out it was because I was double-clicking the [Normal Paragraph Style] to change the paragraph style but when I tried to un-chech the Hypenation box, it would turn to a dash and not an empty box. I found that re-defining the paragraph style fixed it.

Here's how I got it to work:

Open the profile you want to modify from:
Mac: (User)/Library/Application Support/Adobe/Adobe Illustrator version number/language folder/New Document Profiles
Win: C:\Users\....AppData\Roaming\Adobe\Adobe Illustrator version number Settings\language folder\x64\New Document Profiles
Create a textbox and make sure the text is still selected.
In the Paragraph panel, turn Off the Hyphenate checkbox.
In the Paragraph Styles panel select the menu icon on the right-upper corner > Redefine Paragraph Style.
Delete all text items from your artboard and save the document.

Yes; you need to edit the [Normal Paragraph Style] in the document profile(s) you commonly use. Or indeed in all of them.

Document profiles are stored here on Windows 10:

C:\Users\Username\AppData\Roaming\Adobe\Adobe Illustrator 25 Settings\en_LANGUAGE\x64\New Document Profiles

Open the ones you use. Open the Paragraph Style panel. Double-click on [Normal Paragraph Style] and turn off hyphenation. Save and overwrite the AI file in the same location.