You can use it. Using the link ittigger posted above, download Itch. It's a free download. Just don't marry yourself to it - it's a legacy product, and one of these days, when you least expect it, boom.
Serato used to have Itch forums, SSL forums, lots of support for legacy stuff. No more. I just started using Serato DJ myself the last two months, and I have seen a lot of changes.
They were probably working on the PYRO app for phones, and got side swiped by Rekordbox DJ. Put Serato DJ and Mixvibes Cross in a blender, and then back what comes out with the financial power of Pioneer. Believe me, it got their attention. They are preparing for war and IMHO are now 100% Serato DJ (only).