We do not offer any upgrade options to the Computer Kit Touch. This is considered a whole new product with a new screen and graphics driver that enables touch capabilities.
If you have purchased the Computer Kit Complete in the past 30 days and it is unopened then we can process a return and refund for you. You would then place an order for the new Computer Kit Touch. Let us know if this is the case for you! 👍
I hope this helps clarify the product lineup for you!