Unwanted link to Project in Zoho Mail!

For some reason I cannot fathom, there is a link to Project in my free Zoho Mail left panel, below Contacts, Calendar, Tasks, Notes, Links and Dashboard.

I don't need the Project link and I tried to remove it by every means possible, but couldn't.

It's frustrating because it shows a Zoho Project I had opened years ago, and completed.

For reasons to do with my health, I was not using the computer for a longish while, and I had to reactivate my Zoho account which I did recently, now that I'm back on the computer. I went on Zoho Mail clicked on the Project link to see what was in it, and it opened on the defunct project. I found the delete link within that project and cleared all tasks in it, and then deleted the project, but the Project link in the left panel is still there, and when I click on it, it continues to show the name of the defunct project. I tried changing the name of the project, but can't. I tried opening a new project, but it shows as a sub project within the old name. I looked for help in Zoho Mail and Zoho Project, but can't find any way to resolve the problem.

I want to altogether delete the Project link in the left panel, and if the old defunct project is still lurking anywhere in the Zoho servers, I want to delete it. When I need to work on a new project, I will go to Zoho Project rather than the Project link in Zoho Mail.

Will someone please show me what to do?

Thanks.