Corrected the logic to use the datetime of the ROFST rather than the datetime of it's folder.
Use DocVersionInfo.NewerROFst to determine if the update button is enabled.
Changed return values of Evaluate method for U case to support multi units
Changed return values of Evaluate method for S case to support multi units
Changed return value based on selected unit
Added MultiUnitCount property to DocVersion class
Added UnitNames property to DocVersion class
Removed blank line
Added MyDocVersionInfo to DocVersion
Removed GetChildren from editable object
Removed HasChildren from editable object
Removed ActiveParent from editable object
Removed ActiveFormat from editable object
Removed LocalFormat from editable object