Yes you can, but doing so will require you to do a considerable amount of manual work to convert it. All product reviews must be converted to the new post type in UAT, which will require you to add the main product image and all the custom specs manually to each new review.
Converting a review site works best for sites with less than 50 reviews to convert, but there is no limit. The more product reviews you must convert, the more work it will be.
I DO NOT recommend using the Ultimate Azon Theme for sites with over 150 review posts as the amount of work required to convert it would be very large, although possible.