Defaults

I am finding it a problem that the defaults in Sales and Receipts cannot be changed.  I enter most of my customers from here using the quick method and I want them to default to being paid by cash but as soon as you enter your customer name it changes back to 'pay later'.
Before the latest update we could choose when we went into 'Sales' what we wanted our entries to be.  I almost always use cash and now that there is no way to change it except to go into the customer or after you have it entered then go back and change it again, this is causing me twice the work.  It is taking me twice as long to enter these invoices now and then you are not always sure if you have changed it each time.
Please re-instate the option to have it what we want and to have it stay that way.
This part in 'Sales' that I have circled automatically changes back to 'pay later' as soon as I enter a customer name.  I can't go into each customer record to change this as I am mainly doing online sales but need the order info and name info so I do not want to do it under 'one time customer'.  It seems to me, it I change the payment method here (picture) then it should stay that way.  This is how it has always been and this change is not being helpful.