Piwoslaw -
I
DO NOT advocate any of these, but these may give you a hint on what to do :
Windshield Repair
Windshield Crack Repair - The Inventor & Patent Holder Of Ultra Bond Long Crack Repair
On TeeVee I saw one that was insurance-approved. If they can fix the crack, they guarantee the fix for life. Right now my wife has a "star break". It hasn't expanded, so we haven't got around to fixing it.
CarloSW2