Biggest supported size of a note

I'm still testing this ZOho Notebook before purchasing a premium licence and can't work with large notes. I store personal vocabulary in two 13,000-word / 83200-character notes.
Same poor experience with PC, Web, and mobile apps: Is there an application limit in terms of max chars? Would a premium licence help me fix this?
Thanks

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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