Under the distance selling regulations you would normally have the right to cancel the contract of sale within seven days. However, this does not relate to software goods or downloads, which cannot be returned. You do not have the right to cancel an order once the product has been downloaded. This does not affect any other rights that you may have.
However, if you feel that a product you purchased is broken, unusable or not as described then please get in touch and we will happily help.