BoW

I just finished editing a video on an older version and when exporting, I was asked to upgrade to the newest version. When I opened the video in the latest version, I found the sound of the audio files was extremely low, but they were automatically amplified in the older version. I set the "Amplify" under "Audio Effect" but it didn't change a thing. What can I do in the latest version to amplify the audio or is it possible to go back to the older version?