So here is a tutorial on how to get Topaz Clean. I know a lot of people struggle to get it or they just dont know how to get. So here you go and hopefully it works for you.

• STEP 1: First you are going to need to download it so go to this site to install it. Once the site has loaded, click on the free trial to download it. A new page will appear, then go find the one that says Clean, below choose Windows or Mac. Your download should start automatically.
• STEP 2: Once it’s finish downloading, you are going to install it. Make sure your photoshop is closed. So double click on the downloaded file and install it. It will automatically install into your photoshop. 
• STEP 3: Once it’s installed, open photoshop. We are now going to activate it. Open any image in photoshop. Then go to filter and Topaz Labs should be right at the bottom, click on it. A new window should open up. Fiddle around with settings, experament on the image. Then once you are done, click ok. A window should come up asking you to enter the key, purchace key or use 30 day trail. Click on enter key, a new small window should open asking for your name and license key. Go to this site and click show serial number and just copy and paste the name and the serial number to the name and license key window and then click ok and it should be activated.

If you have any questions about this, just leave me a message in my ask box. Hope this helps. :)