Kizby 1.0.13 is now out and about. This is primarily a bug-fixing release.
We have added support for shifting an entire project to a different start or due date. From the “Planning”, right click on a project, and choose Change Start Date → Shift entire project…, and select the new start date. All uncompleted tasks and subprojects of the project will have their start date shifted by the same amount. If the selected project does not have a start date, then the earliest uncompleted subproject or tasks is used.