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: Click Applications > BorisFX > Continuum 2022 OFX > Uninstall Continuum 2022 OFX.
Step 3: Restart Filmora and make sure you have logged in to it with your license email.
Step 4: 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 Activate button on the Boris editing panel.
Step 2: Choose Activate your license now and click Continue.
Step 3: Input registration code,then click Continue and Done.
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.