If a design node becomes locked due to an ArcMap crash, it may be unlocked using the Unlock Design task. The user must be the owner of the design to unlock it. There are several instances in which a design may NOT be unlocked:
Another user is currently editing the design in ArcMap
Another user owns the design
The design is part of a work request that contains an approved design
If an Unlock task is not available for a node type, your administrator may need to create it using the Process Framework Admin Tool.