Bought Arria V Starer kit from Digi-Key but did not come with license

Ideally you could contact Intel(Altera) Sales and inquire about your license along with your purchase invoice. They should be able to help you with the license request .

You could also visit the following link and see if you can register for an Intel account and generate a valid license for your software:

https://www.intel.com/content/www/us/en/programmable/support/support-resources/support-centers/licensing.html