Hi there Yes, I believe so, if this is what you mean: https://support.apple.com/en-lb/HT201607 It doesn't change it. I can still choose to open with mail, but it's a 2-3 step proces instead of just clicking it open in the right application right away :-/
I have Evernote on both my computers ( Imac and Macbook Air). On my Imac the default mail app is Mail - but on my MBA it is Outlook ( I used Outlook as my mail client at a time). I want to change the default mail client, so my saved mails open in Mail, when I doubleclick on them on my MBA as they do on my Imac. I have attached a screenshot.