Storyline360 Extremely Slow Saving/Opening

I am experiencing this as well.  It's always been a bit slow, but lately it's just unbearably slow.   It takes a long time to open, and every time I save, it takes at least 10 minutes if not more.  I save often because it also crashes more frequently than it used to.  I'm in a vicious loop.   Since I got tired of losing hours worth of work due to not saving often enough , I have started to save more often, BUT now it takes 10+ minutes  to save every time and I always save before I preview because sometimes previewing triggers it to crash!  Previewing also takes forever and often just results in a black screen and I have to try it again.

I read Michaels post (above) from a few years ago.  The three items that were suggested , I checked and am doing.  SL is up to date.  My PC should not have an issue - I have good processor, plenty of disk space, a good graphics card, etc.  I was a bit low on RAM because I have a lot of large programs and files on my local drive.  Thinking that might be the cause, I moved 90% of that to an external drive and uninstalled programs I don't use often. This freed up some RAM, but it has not improved the lag time in SL360.  

The eLearning courses I'm creating these days are more robust than in years past.  More videos, branching, media, etc. so the projects are large, but agree with Michaels post, that should not be an issue these days and isn't with other authoring tools.  Like him, I like Articulate products better  than some of the other tools out there, but if this keeps up I am going to have no choice but to find a different tool.   

I'm wondering if you can share what the solution was, if there was one?   Is this fixable?  Or am I doomed to return to Captivate?  Or something else?