Hi Donna,
Thanks for reaching out to embroidery.com! I checked into this, and it doesn't look like you purchased the Thumbnailer through our company. Unfortunately, that means we don't have the license number. I would recommend reaching out to the main Embrilliance company, to see if they have it. Here is a link to their support: https://embrilliance.com/contact-us-2 Another option is that you can contact the company you originally purchased the Thumbnailer from. Sorry we can't help you more on this situation. Best of luck, and have a great day!
Donna G.
I bought Thumbnailer quite a number of years ago and no longer have the license number to put in my new computer Would you all have a copy