SYMPTOM:
The 'Edit' option when right clicking in an event is grayed out in Strategy Developer 9.x and 10
This behavior can be observed from the Events Manager section under "Administration -> Configuration Managers -> Events" as shown below:

CAUSE:
Event objects in Strategy cannot be edited. For this reason, the 'Edit' option is unavilable. The presence of this option is a known issue in Strategy Developer 9.x and 10.
ACTION:
Contact Strategy Technical Support for an update on the status of this issue.