Still not working in VM 3.6.11 10289 - still need to edit changes to Coupon Discounts in the database table directly #__virtuemart_orders
I see some progress as the amount for the Coupon Discount 'coupon_discount' is now editable ... but if you change the value of the Coupon Discount then the order total is not calculated correctly.
Also, still unable to edit the Coupon Code 'coupon_code' when editing an order - just having a text field we can edit would be great (not asking for values from VM Coupons or 3rd party component / plugin like 'AwoCoupon Virtuemart' ... though that would be an awesome improvement).
Also, if you update your order items and change their amounts, the Coupon Discount amount is not updated automatically.