However, please note we are constantly working on the enhancement of the quality of our text to speech engines and we can not guarantee that the regenerated file will be 100% equivalent to the version originally purchased and downloaded. After 7 days you can regenerate your sound files from the original texts for free during the lifetime of you account. Your sound files are stored for 7 days after you have purchased them and you can download them up to 5 times for back up purposes. Your personal account will give you access to the log of your file creation and your payment history. After 6 months your prepayment will not be reimbursable anymore, but you will be able to convert text into sound files as long as your account exists. Your prepayment is valid within 6 months after it has been paid by you.