AWO Pro suddenly stops accepting coupons

A customer just informed me that our free shipping coupon stopped working. I have tested this and cannot get AWO Coupon Pro to accept the coupon. I get a standard error. I have tried creating a new coupon with the same qualities and still it is not accepted.

I have not changed any settings in our VM instance. Any suggestions? I looked at install status and everything is fine.

As a pro user do I get free updates to the software? I noticed it is an older version.

Hello,

You have free upgrades for up to a year, after that you would have to renew. Here is the upgrade process:
https://awodev.com/documentation/frequently-asked-questions#install-upgrade

For the shipping problem, in awocoupon->configuration do you have "Enable entry of shipping coupon before shipper is selected" set to yes? Also if still having problems, have you gone to awocoupon->configuration->error messages and changed the error messages to something identifiable to see where the coupon code is failing?