Hello @llama
Thank you for reaching out on the community and telling us about your issue. I do apologize for the issue you're having. You should be able to install Quicken on your new computer by downloading it and signing in. The article down below will explain more about moving computers.https://www.quicken.com/support/how-do-i-move-my-quicken-data-file-one-computer-anotherTo download Quicken again I'll also leave an article down below with instructions on how to do so.
https://www.quicken.com/support/how-do-i-download-quicken-quickencom-after-i-buy-it
Once you've installed the program again you can use a backup to install it onto your new computer. Check to make sure your downloads are working and you should be all set.
If you have any questions please let us know!
Thanks,
Quicken Francisco