For Stopping the Lagging Process / Force stop for running process in the Record List 
Open   then Click  

The Reset option will close the running process in the record list.

Process lags are caused when converting huge file.
You can prevent this type of Lag by converting the huge wav, flav formats of audio to Mp3. As Mp3 is optimized format which we recommend for conversion.
Process lags are caused high when the Application uses internet.
You can also avoid this lagging by making sure of healthy Internet/Data Connection.