In the documentation it is suggested to use the "Reset Microsoft Templates" action.And there is a caution section ... informingThe Reset Microsoft Templates action resets all of the Microsoft workflow templates. You can't reset a single template.Fair enough. But actually this function does not only reset the templates. It destroys existing workflows if the name of the workflow, created from a template, has not be renamned and still starts with 'MS-'There seems to be no hint / no recommendation to change the name of a workflow in order to prevent losing all workflow steps on reset.A simple warning or confirmation dialog is the bare minimum, but it's not really enough.This function should really only modify the workflow templates and add new templates — it must not destroy existing workflows!