I've just uploaded 0.0.3:
* There was a bug that was triggered when you wanted to create QR codes. This is fixed now.
* Until now you had to choose QR code when you wanted to use non-numeric attributes or numeric attributes with more than 13 digits for the barcode. Now you can use code39 barcodes (https://en.wikipedia.org/wiki/Code_39
) - thanks for the use feedback @FlorianN