Constant crashing and "beach balls"

I absolutely love Hitfilm and the ability to both edit and composite in the same program. However, I'm running into a lot of trouble just working with the program. I'm getting constant crashes and force closes and the dreaded "beach ball of death" making me consistently have to force close the app due to a lock up. This tends to happen most when I'm just on the editor and scrolling back and fourth and making small changes to clips by cutting and splicing them together. I've been working on a lightsaber aftereffect and even with all the rotoscoping and aftereffects on I don't get rarely and crashes it's just when I'm on the timeline scrolling and making edits to the acutal film content itself and nt compisiI'm on a 2012 Macbook Pro with 8GB of Ram but everything else stock. I just want to be able to run hitfilm without the constant crashes. Is there any way I can fix this problem? 


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