The add-on does not hold any of your data. The link to each of your files is passed to the Google Charts API to generate the QR code. This information is not retained. All generated files are created in your My Drive
Each time you run the QR Creator it will generate a Google Slides presentation in your MyDrive
Yes! You can choose from 6 QR codes per page (3x2), 15 QR codes per page (5x3), 2 QR codes per page (2x1) or 1 QR per page (1x1)
Due to Google's changes in add-on permissions, the old version was no longer able to be verified. Seeing as this version is much faster and more useful, we made the decision to completely remove the old one.