all printers disappeared from HPSM 9.30.274 printer selection


following problem occured to two of my coworkers:

If they want to print something out of the HPSM application the printer selection list stays empty as if there was no printer installed on the pc.

The printers work in every other apllication.

Reinstalling HPSM didn't fix it.

The computers run Win7 Enterprise 64bit

HPSM Version is 9.30.274