Dialogs slow to open

I haven’t used LO over summer break, during which time I upgraded to Windows 10 and LO 5.x. Now that I’m back to school, I’ve been using LO a lot more often and have noticed that it’s very slow doing some operations, particularly opening dialog boxes of any kind (e.g. save as or cell formatting in Calc). I haven’t had a chance to try things out on my desktop since I’ve been away from home, but my laptop is a Yoga 2 Pro, which isn’t old by any stretch, and everything else runs fine. Any ideas? I’ve already tried the suggested fix in this thread LibreOffice UI Dialogs slow to open.

RFO