When you first launch Notebooks 2.0 and it asks you for its Notebooks Home (the folder where its expects your documents), just point it to the same folder you are using as Notebooks Home in Notebooks 1.x.

Notebooks for Mac stores its documents are regular files in folders on your Mac. Since Notebooks 2 and Notebooks 1.x are compatible, a migration process is not necessary. You can even run Notebooks 1.x and Notebooks 2.0 side by side without any issues.

Migrate from Notebooks 1.x to Notebooks 2.0