You can flush printed pins so that the software can see it as a new set of pins. Hence, the software won’t force you to consider-reprinting whenever you try printing the vouchers.
To flush, sign in to : https://account.printairtimeonline.com
Click the “import pins” tab to access the flush pins section
Click “Flush Printed”, select the epin file you’ve printed
Enter your password
Click the “Flush” button.
Thereafter, you can re-import the epins as new epins and print.
NB : Repeat same steps if you want to delete unprinted epins but you will have to click “Flush Unprinted”