I’ve just released a new minor update to GT-Vouchers for the original GeoTheme. There was a bug for new users when setting up the plugin that caused the database to not be updated properly.
The gt_vouchers_vouchers table would not be created when the plugin was activated causing an error saying: Sorry, your voucher could not be created. Please click back and try again to be displayed when saving a voucher.
Users who upgraded recently may also have been missing an index. This would result is slightly slower performance in some cases, but generally nothing noticeable.
After installing this update, you should deactivate GT-Vouchers and then re-activate it. No data will be lost.