Cathy, It looks like you're still logged into your husband's account. At the top of any WikiTree page, there is a menu in very small text. The first item on it is "My WikiTree". Click that and a long list of options will drop down from it. Select "Settings" on that list to go to the Settings page. There, you will see all kinds of settings - one kind will be Email, where you will see checkboxes for what kinds of messages you want to receive. Just un-check all of them, then make sure you save your changes.
To get you to be manager of all the profiles that he manages, when you're logged into his account, click that My WikiTree menu again and select "Watchlist" (I think it's the last one - they're listed alphabetically). There will be a bunch of buttons across the top - click Watchlist Changes - it's the last one on the right. You will see an option to add someone else to all profiles on your watchlist - select that and the rest will be easy. After you do that, you can remove him from all the profiles if that's what he wants. Just be sure that you are manager of them before doing that!