You're looking for a free registration code for Wondershare Filmora 7.8.9. Here are some features of Wondershare Filmora and a possible solution:
Overview
There is no magic, working, free lifetime registration code for Wondershare Filmora 78, 9, or any version. Anyone selling or sharing such codes is either scamming you or spreading malware.
Would you like more information on Filmora's pricing plans or alternative video editing software options?
Verdict: Skip the "free codes" from 2018. Download the latest version from the official site, use the free tier to learn the ropes, and upgrade when you're ready to remove the watermark.