Hi @kw05
I hope you are doing good today.
1. I read somewhere that the activation link is sent by wordpress and not forminator, meaning that the email addresses of the two are different. Is there a way to fix that without actually changing my WP admin email?
Please consider using SMTP plugin which will control in this case From Name Header.
2. Knowing that forminator creates forms that can only be put on a page, is there a way to make it to where in my main header menu, it shows logout instead of login when a user is logged in?
It does not sounds like Forminator related thing but more like wp core. If I get you right, you would like to show login link in header menu when the user is not logged in and log out link when the user is logged in.
In this case, you can simply create 2 items in your menu:
log in -> link to login page
log out -> link to https://domain.com/wp-login.php?action=logout
Later on, on the home page, you will see both links. Check both links classes in the page source. In the end, you will add such CSS to hide or show both menu items:
.logged-in #menu-item-208 {display:none;}
#menu-item-209 {display:none;}
.logged-in #menu-item-209 {display:block;}
208 ID in this case is log in link
209 ID in this case is log out link
3. Is there a way to remove the wordpress header when users are logged in and change it to something else?
As above, sound like not a Forminator case. If your site use page builder, you can create additional div/section in header and add some custom ID or class. Following the above CSS example, you can hide the main header for logged-in users and show this additional section, which will be hidden by default.
Kind Regards,
Kris