ResearchGate makes it easy for you to add your publications as well as your unpublished work to your profile. There are two ways to add research to your profile.
1. Confirm authorship of a publication that already exists on ResearchGate
2. Create a publication page for your research that's not yet on ResearchGate
I think Add new is still there which is in the blue color
After that you choose Publish research, then choose Article
ResearchGate makes it easy for you to add your publications as well as your unpublished work to your profile. There are two ways to add research to your profile.
Confirm authorship of a publication that already exists on ResearchGate
Create a publication page for your research that's not yet on ResearchGate
You'll find clear instructions on both methods of adding research below. Once you’ve added your publications and research to your profile, they’ll be listed under your Research tab.
You can learn more about what ResearchGate is, the difference between a publication page and a full-text, and what it means to confirm authorship of a publication here.
If you have questions about whether you're allowed to share your content on ResearchGate, see the Copyright section in the Help Center.