I downloaded the trial of Vegas Pro 20 yesterday and it ran smoothly (years ago I used to use Pro 8 & 13 and was used to somewhat regular crashing). Today I've tried to use it and as soon as I try to do anything, it says 'not responding'. The video preview is staying black or taking many minutes to load (even when all I'm trying to preview is a picture) and pressing 'play' makes it crash.
Any suggestions on how to fix it? I don't understand why it was fine yesterday but isn't working at all today when no settings have changed,