Try e-mailing support@stardock.com and tell them your situation and which product you want, there's a decent chance they might offer you a refund if you purchase what you need since you probably just bought it.
Make sure to refer your Order Number and date of purchase, and what you'd like to upgrade to. (If I'm not mistaken Multiplicity KVM is only 10$ more than the full Object Desktop suite).
At least worth the e-mail, if they offer you anything you're better off than you are now 
