Edgard,
1) In the upcoming V7.7, you can set the "Working Directory" (see attached screenshot).
I don't have a good answer to 2). In V7.7 there is a "Repeat Task (Minutes)" option but as I understand it, your "repeat task" is not constant.
BTW, the task name has to be unique! If you add the task repeatedly and it fails then you tried to add the same task (name) twice. Windows does not allow this.
HTH,
Friedrich