To restore your audio to a video clip, you will need a video editing program. What editor do you use? And which FXhome program did you export from?
The simplest way is to place your original audio into an audio track in your video editor, and then place your exported video on a video track. Make sure they are synced and you are good to go.
Also, in the future, please make any support threads in the support section
instead of 'General Chat'.