An update was also released for PowerStore 3 to 3.01 to correct this issue.
if you wish to correct it manually, open the admin/coupons_Update.php page, find the following code:
<inp]ut type="button" name="EditCouponProducts" id="EditCouponProducts" value="Edit Products" alt="Edit Coupon Products" onclick="document.location.href='products_Search.php?InProcess=AddToCoupon&CouponID=<?php echo($row_WADAcoupons['CouponID']); ?>'" />
and change it to:
<inp]ut type="button" name="EditCouponProducts" id="EditCouponProducts" value="Edit Products" alt="Edit Coupon Products" onclick="document.location.href='Products_Search.php?InProcess=AddToCoupon&CouponID=<?php echo($row_WADAcoupons['CouponID']); ?>'" />