I am trying to reuse some HW sets from a past course. I can see that they are saved as sethw1.def, sethw2.def and so on in templates (available through File Manager). However, the only file for HW #4 is sethw4.def.bak, even though I can display HW set #4 in Homework Sets Editor and even though I am sure I never deleted sethw4.def.
(I edited that set from some older set, before assigning it to students.)
My second question is: How can I save my HW set #4 available in Homework Sets Editor to a .def file?