There is also a breaking change in this release that needs to be paid attention to.
Previously, when a Binding was specified in the below properties, we were adding a default Mode=TwoWay to the specified binding, however, now with 7.0, we don't do that and this has to be specified explicitly like below:
<radiantq:GanttControl x:Name="ganttControl" Grid.Column="1" IDBinding="{Binding TaskID}"
NameBinding="{Binding TaskName, Mode=TwoWay}" IndentLevelBinding="{Binding IndentLevel, Mode=TwoWay}"
StartTimeBinding="{Binding StartTime, Mode=TwoWay}" EffortBinding="{Binding RequiredEffort, Mode=TwoWay}"
ProgressPercentBinding="{Binding CompletedEffort, Mode=TwoWay, Converter={StaticResource converter}}"
PredecessorIndicesBinding="{Binding PredecessorIndices, Mode=TwoWay}"
PreferredStartTimeBinding="{Binding PreferredStartTime, Mode=TwoWay}" SortOrderBinding="{Binding SortOrder, Mode=TwoWay}"
AssignedResourcesBinding="{Binding AssignedResources, Mode=TwoWay}"
>