Today (17th April) I installed updates to V10.  Coincidentally I have since had problems!  When previewing a site, if I click on a link to a .pdf file the programme hangs and cannot continue.  When I reopen it I am advised that the Website I am trying to open is already in use or it didn't shut down properly.  I have lost the template layout of the website.  This is making it impossible to work with. Please advise urgently.  Many thanks..