We need .twbx though.but If you want to see data for 2015 Only . Drag your Year Filter to CONTEXT and Select 2015. Now it will display 2015 values only.
Use order date dimension into view and create viz.
Order date comes with all hierarchy.
whey we click + symbol then it will extend and show at quarter level and day etc.
User YEAR([Order date]) as context filter and select 2015.