a bit unusual IMO you aren't asking him to change it yet - only if it can be done.
With that said, it is easy to change out the flag within the extension thru the cPanel file access or FTP. I remember you said you weren't very good with FTP, but it is really easy once you do it - and a good knowledge to have in your webmaster know-how.
So if you need this extension, the "wrong flag" shouldn't hold you back. But in reading his reviews he does seem to be a bit uneven in his customer service - one person loved the service, the other didn't get any. But both say the extension works fine. Just the customer service seems to be the issue.
Hope this helps you a bit
Lee