Otherwise, you may be able to do an in-place upgrade from 1.68.9 to 1.68.20 using the in-place upgrade mechanism.
If this however doesn't show any available upgrades it might be you would need to migrate to upgrade - in this case we recommend using the patch or raising a support case with our helpful support team at https://support.matillion.com
They can help with the patch or upgrade if you need it.