You should have received an email after you purchased VueScan with a link to your license.
You can retrieve your old license with your original email address and at least one other piece of confirming information here. This is the same form we would use to search for your receipt, so it makes sense for you to use this form instead of us trying use this (you have more info for this search than we do). For this reason, we regret to say that we don’t manually search for lost licenses.
If you bought a subscription, this license will have a link labeled ‘Manage Subscription’. If you need to cancel your subscription, click this.
If you have VueScan installed on your machine, you can find instructions on how to retrieve your license here.