Sometime there are updates of single tasks, without a bundled Workflow Designer update.
There are also tasks, which are not installed automatically.
If you want to check for tasks/updates or our support request this, use the following howto:
Click on the Link “Task Management” in sidebar of Workflow Designer Configuration page. 
This page contain every task you could use in Workflow Designer and allow to distribute updates, independently from main module.
Repositories are updates daily by Cronjob. You also could trigger the Update manually with the Button “Update Repositories”
Install new Tasks by click on “Install” or install updates with the “Upgrade” Button.
