You'll need to speak to TurboTax Customer Support by phone on Monday. Tell them what happened and ask for the 2014 download.
Use the form at the link below to be assigned a phone number or schedule a callback. The contact info will not display when they are closed, so there's no need to try until tomorrow. This time of year they are open 5AM-5PM Pacific (8AM-8PM Eastern) Mon-Fri.
https://support.turbotax.intuit.com/contact
When you use that contact form tomorrow, where it asks what product you are using, in the dropdown menu be sure to indicate "CD/download" and the correct operating system.
