Yes, after installing the v15.1 trial version, v12 would not run. I had a popup message saying it could not find a file or resource or something. Unfortunately I have now since uninstalled v12, but I do have a copy v11 that still works as a backup. I might raise a support ticket. Thanks anyway. This is the first time since starting with Xara programs (v6) that I've paid for what seems like nothing much at all.