All notes disappeared

All notes disappeared

I've been using the notebook app for over five years on my phone without being logged into an account. A few days ago I opened the app and all my notes had disappeared. Since then I tried restarting my phone, updating the app and logging into my account, but nothing helped. I don't know what else I could do. I had many notes and they were very important to me. Is there anything else I can do to get my notes back? Can someone help me?
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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