To change your email address on ResearchGate, please follow these steps:
Click on your profile image in the upper right corner of the page.
From the dropdown menu, select “Settings” (fourth option in the list).
A new page will open. At the very top of this page, you will see the Email address section, where you can add a new email, set it as your primary email, or remove an old one.
This will ensure that all notifications are sent to your preferred email address.