You can often boost your volume for free by enabling "Loudness Equalization" in your Windows sound settings under Playback Devices > Properties > Enhancements . Download - Letasoft Sound Booster
Contact Letasoft support at their official contact points to ask for a manual extension of the trial period on your specific machine. Why "Trial Reset" Tools Often Fail
Every 5 minutes, the amplification stops for 5 seconds.