i completed a few recurring tasks using the Chrome plugin and want to restore them but they dont show up in the projects completed task list.
Unlike tasks with a single date or no date, completing a recurring task does not move it to the history at the bottom of a project. Instead, its date is being moved to the next occurrence.
Therefore, to "roll back" such task, please reenter its date formula including the "starting" parameter. So, for example, if your task was due "every Friday" and shouldn't have been completed, please change the due date formula to "every Friday starting 5. Apr 2013". This task will then become overdue just as it was before the completion.