Long time to import from PowerPoint?

I frequently have issues with importing relatively small PowerPoints into Storyline and it grinds to a halt. Essentially this is not really to do with the PowerPoint, but that Storyline iteslf has got itself in a jam. The fix that works for me is to uninstall Storyline and then re-install....the PPT file then imports as it should (in a reasonable timeframe that you can actually see progressing), and the whole process takes much, much less time than I was waiting for the PowerPoint to import!