Sadly we are still having problems with processing refunds and exchanges. If an item is bought online, you can not process simple exchange in store, you have to refund online order first and then generate brand new sale in store and ask for another payment. A lot of customers are not happy with that, so we have to do it manually on paper, then we have to amend stock levels manually as well. It is too inefficient and causes problems with our book-keeping.
For the refunds, if the customer does not have a receipt (we sell custom-made items so we know they are ours), it is too difficult to locate an original cash sale. Again we have been processing refunds manually on paper, which causes all sorts of problems.
I was assured by the developers that a feature "refund without receipt" will be implemented in the future, but have not been given an indication of the time frame and I do not think it will happen any time soon. This app is great, if you do not need refund or exchange function. But we will be looking elsewhere.

i have used this app before, but something went wrong with it, and it was deleted from my store. Now i cant install the app. I get this error message.
Invalid nonce.