abuse address agree blocked cart checkout checkouts continue due error free frustrating hours limited message prevent ridiculous software testing thank-you-page tough uggh unblock

I am trying to test this cart software and now have this ridiculous message:

Cart Error: Free Checkout blocked for your IP address due to abuse. Please unblock my IP address so I can continue testing this software!

To prevent abuse, free checkouts are limited to 5 per 48 hours per IP. There is no way to unblock an IP.

I agree. It's very tough to test this software. Is there a better way to test this? I'm trying to test the thank you page by Free Checkout.....uggh!! Very frustrating.