we've found the upgrade script here http://nopcommerce.codeplex.com/SourceControl/changeset/view/27d37ba9311b
but this page has only v1.9 and later! I surely understand that we have to run upgrade for each versions, but where can we find the upgrade script / tool / direction for lower version?
we are currently using v1.6.
(I checked some topics which are discussing on older versions, and it seems we can upgrade. but these topics do not contain the link to the upgrade script.) thanks!