New Zoho Notebook account-Sharing seems to require an upgrade

New Zoho Notebook account-Sharing seems to require an upgrade

Hi People 
Have just signed up for Zoho Notebook Pro. When I try to share a popup asks me to upgrade.  My signup is for NotebookPro.

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      • Migrate your Notebook data to the new, mobile Notebook.

        Zoho Notebook is transforming. The new version will include exciting new features and a completely new user experience. The initial version will be mobile based, available for Android and iOS. A new web version will be available after the initial mobile release.   With the release of the new Notebook approaching, we're migrating most of your current data to the new version. Once the new version is released, there will be an additional window to migrate your data. We will not provide access to the