BorisFX integrated in Filmroa is licensed customized edition, if want to use it in Filmora, you have to purchase separately here.
And you need to activate manually with the registration code after purchasing.
For Win:
There are two entrances for you to activate: The Activate button when dragging Boris effects to timeline and License button on the Boris edition interface.
Then choose Activate your license now and click Next.
Input your registration code, click Next and then Finish, restart Filmora.
For Mac:
There are two entrances for you to activate: the Activate button when dragging Boris effects to timeline and License button on the Boris edition interface.
Then choose Activate your license now and click Continue.
Input your registration code, click Continue and then Done, restart Filmora.