Boris's activation method changed in Filmora 12 and above. No need a registration code but only requires you to log in to Filmora.
If you can't get it activated, please refer to the below steps to reinstall the new Boris Plug-ins and try again.
Step 1: Quit Filmora and Boris FX application.
Step 2: Go to Apps & Features, search for Boris, and select Uninstall.
Step 3: Find the below folder and delete it: C:Program FilesBorisFX.
Step 4: Restart Filmora and make sure you have logged in to it with your license email.
Step 5: Redownload Boris FX, and you'll see it is activated.
For Filmora11 and older versions users, please follow the steps below to register it.
Step 1: Click Activate button when dragging Boris's effects to the timeline.Or click License button on the Boris editing panel:
Step 2: Choose Activate your license now and click Next.
Step 3: Input registration code,then click Next and Finish.
Step 4: Restart Filmora. If the watermark still appears, kindly send a screen recording video of this problem to our technical team at customer_service@wondershare.com.