Bizagi wont start - Error in libdef.dll

We can longer start Bizagi modeler, it crashed immediately and created 2 event viewer logs..

We have tried on several machines, with both an older version, and also with the latest version, the results are the same

It appears as though a windows update or similar must have broken LIBDEF.DLL usage. We are running on French Language machines..

Here is the event viewer log.

Nom de l’application défaillante BizagiModeler.exe, version :, horodatage : 0x607e193c

Nom du module défaillant : libcef.dll, version :, horodatage : 0x5ee3e671

Code d’exception : 0x80000003

Décalage d’erreur : 0x00000000021c56be

ID du processus défaillant : 0x6468

Heure de début de l’application défaillante : 0x01d8611e998944dd