windows xp sitebuilder, saving but not publishing

I am running an older computer that still uses XP and I'm running Homestead Sitebuilder.  I was able to makes changes 2 days ago and both save and publish.  Today, I can save but the system is not allowing me to publish saying I need to close Sitebuilder and reopen so it updates, which I did, to no effect.  The window further states that if this does not work, to contact customer support.  Why was this working 2 days ago and not today???