why does it take 17 minutes to load sitebuilder desktop for windows 10? 3 or 4 weeks ago it was 7 minutes.

After using sitebuilder on WinXP for many years switched to windows 10 September 2018.  Finally settled on desktop version so I could work offline.  Now it seems I have to load from the server.  December of 2017 it was taking 6-1/2 minutes to load sitebuilder.  Last week I fired up sitebuilder and it took 17 minutes to load.  This is unacceptable.  Anyone have a fix???