@Robert-Hardy Yes, you can go in the store, select the instruments sub menu and then click on the coupon button at the bottom of the window. The button has a yellow number showing the number of remaining coupons. If you clicked on the button a list of instruments will open from which you can select your free ones.
This bundle includes Samplitude Music Studio 2020 which comes with a lot of Vita Instruments. It should be possible to enter the serial number of Music Studio inside Music Maker to unlock all of these Vita Instruments (at least it worked back in Music Maker 2020 when I tried it). Then you would have a lot of instruments and still your coupons for some more but you wouldn't waste your coupons in case the instruments are also included in Music Studio 2020.
Music Studio also works similar to Music Maker but has much more features and it runs more stable.
I can't even do that. When I go to redeem credit a white screen pops up and nothing happens. magix wants screen shots and I don't know how to take them. Some thing went wrong when I down loaded it. I got an error message, They want the number or something and I don't have it. Can you help?
@Robert-Hardy Here is a screenshot. You need to select the store, a category, then click on the coupon button at the bottom of the store to open a selection of items. Then you can select something for free.