Storyline 3 running slowly - mystery solved!
I thought I had a problem with Storyline 3 because some pages I was working on were processing soooo slowly. I checked the forums and reinstalled my software, but the problem persisted.
Finally, I found that I had some background images that were almost 5MB in size! I didn't realise they were this large. I reduced the size and re-imported them into my Storyline master pages and viola! everything is moving quickly again.
Just put this under "traps for young players". I hope it helps.