funny how some things happen isn't it? My best guess is that either: a) Your windows firewall magically started blocking the program after the house move (maybe it recognised your internet connection as a "new connection" instead of registering it as the same old one.) b) It was just a coincidental change that you perhaps installed some new software, or changed some settings around the same time that you moved house. I encountered a similar sort of issue (minus the house swap) where I tested the program on a Tuesday to see that it was working fine after someone said there was an issue with it - and it worked fine. The next day, I tried again, and the thing wouldn't work for some reason. I realised later that on Tuesday night, I set my router to upgrade its firmware, which turned UPnP off. Perhaps your router has done a similar thing? Try going into your router's settings and looking for UPnP and making sure it's turned on. Hopefully that helps Sorry for the very (very) long delay in replying, the notifications haven't updated me on the goings on here If you go into your firewall settings, and choose "Allow a program through the firewall" it should give you the option to browse for a program. Click that, and browse to the application to select it, and then hit save (you may need to have admin rights, and a restart may be required afterwards) EDIT by Moderator: merged posts, please use the edit button instead of double posting.