Storyline 360 - crashing

I am having the same problem as Liz Perkins. I'm using the latest Storyline 360 version (v3.46.236.20.0) and my file is ~60MB. My course is 9 scenes, seven lessons, and I have speech to text on most screens, and three 1-minute videos. Average slides per lesson is 24. For some reason Storyline keeps crashing after about 30 - 40 minutes of work. I add a slide, or edit a slide, save, add a couple of simple click-to -learn interactions, save, stuff like that, and then my system crashes. I have tried my file on 2 different computers with the same results. I shut down all other applications that I can when running Storyline, but the crashing is killing me with all of the rework I have to do! If my file size is too large and the recommendation is to separate it into individual files, can you please direct me to the procedures for this task? Also, I have checked my story_content folder after publishing and it is about 18MB. Pease help!