hello,,,so when I use to start up Logic Pro the little square was black and on the track screen the top where the time/beats was black,,,,,,I tried to download a plug in and when I restarted the computer and started up Logic Pro the little square was white and the area by the time/beats was white as well,,,,,,all tracks are quieter than before and any songs I question up are quieter as well.how can I make it like it was.....please help.thanks