How do I change the default program when opening a document on SMART Notebook 10 on a Mac?

I accidentally changed the default program for when I open a document, to TextEdit, and don't know how to change it back to Notebook for all the documents. Any help? I need an answer fast.How do I change the default program when opening a document on SMART Notebook 10 on a Mac?
- Right-click the document and select Get Info

- in the Open with: section, click the selection box and go to Other

- browse Applications folder for the app you want, click it and click Always Open With

- click Add

- back in the Get Info box, in the Open with: section, click Change All so it'll change all documents with that extension