The only way to get "Smart"Share to refresh folder contents is to manually remove the affected shared folders, and then readd them. Every single time there is a change. There will never be an auto-refresh. Ever.
Thanks, LG (yes, that's sarcasm).
PS. Extra points for throwing my first reply to the bit heaven in the process of registering an account (which you said I can do later but, apparently, I can not).
PPS. Oh, and couple more extra points for making "Smart"Share PC client EXCRUCIATINGLY slow and clumsy in everything.