Apparently with Notebook version 6.01 in Android 13, when I try to edit an existing Notebook page, I get an offer to upgrade to Notebook Pro / Premium.  I feel I don't need the features of Pro, so I don't want to upgrade.  HOWEVER, after X'ing out of the offer window, I can no longer update my existing notebook page. 

Is it required to upgrade to Pro?  If so, I will need to find an alternative product.  As a workaround for now, I am editing the page in the Web app.