Upgrade from 4.70.0 to 4.76.1

Hello,

We are trying to upgrade our ticket system from 4.70.0 to 4.76.1, however the upgrade file format is different and no longer includes the upload directory for manual upgrading... I'm guessing we are missing a incremental version that added or simplified the upgrade process however I do not have access to it in my.kayako.com.

Which version would that be and how would I get access to older versions to proceed?

Thank you in advance,
Don Merriman