Launch DiagBox. On the main screen, top-right corner should display: If it still says 7.57, the update failed – repeat from Step 3.
The Diagbox update from version is a critical incremental step for maintaining the stability and functionality of this PSA (Peugeot/Citroën) diagnostic software. It is widely considered one of the most stable versions for vehicles manufactured up to late 2014. Why Update to 7.58? diagbox 757 to 758 download free
Updating DiagBox is a sequential process. You cannot skip versions; you must have version 7.57 fully installed and activated before applying the 7.58 patch. Launch DiagBox