Generally,
- An Upgrade is from a product to a more extensive edition of that product, such as from ST4 SE to ST4, or from ST4 to ST4 MAX,
- A Crossgrade is from a product with a standard List Price of 99.99 (excluding taxes) to another product. For example, from ST4 to Syntronik Deluxe.
- Upgrade and Crossgrade prices (to get to a particular product) may or may not be the same.
The Sample Tank 4 Upgrade is to the full ST4 library, with over 260 GB and 8,000 instrument presets. My understanding is that it would be an Upgrade from ST4 SE. But it may be that you have another paid-for product (not a bonus) that qualifies you for a ST4 crossgrade??
What did you buy in the Group Buy?
What other IK Multimedia products have you bought?
What is your list of available bonus products?
For a definitive answer, please contact
Sales/Account Support, via here. You will be able to search the FAQs first, but if they do not resolve your issue, there is a link at the top to a Support form. Sales Support can look at your Account and see what's going on. Response time normally is within 2 working days (US (East Coast) Business hours, generally), but in the current circumstances please allow some more time. Administrators and Moderators here cannot access your Account.