I just need to update on an earlier issue we were discussing - I reported on having a possible 'bug' with MS 13 with it not limiting renders to a loop region only (when a region was active). I have now discovered that there is a slight change to the interface which its would good for all to know ...
now the inital screen for 'make movie' has some basic defaults with check buttons - here there is the tickbox for 'render loop region only'. I was checking this, then going into 'advanced options' to choose a more specific template. Turns out that once you enter 'advanced options' screen the previously ticked box for 'render loop region active' disappears and becomes de-activated (without the user knowing it!).
There is now a small drop-down list top right on the 'advanced' page which includes the 'render loop region only' box again (very small!), and you can't see this until opening up the little triangular drop-down. Good to know