The trial mark in Bullzip has to do with activating features that goes beyond the basic version. Please reset the BullZip settings and check the bullzip manual.

Please contact us to sales@archigrafix.com regarding the issues with Docuflow 4.3

We need to know in what case does it hang (becomes unresponsive) / crash (presents a exception).

What driver and settings are selected, so that we can replicate that error on our side. It would be helpful for instance with screenshots of the dialogs tabs before printing.

With the latest update of Douflow 4.3 the printer becomes non-responsive after the first sheet printed using PDF24. 

BullZip is also adding a thin red "trial mode - click here for details" water mark to the left edge of sheets.