Have you tried using the clipboard to copy and paste your blueprints? So open the project in UE4.3 and select all the nodes in your blueprint and then CTRL-C, then open it in UE4.4 and CTRL-v to paste. No idea if it will make any difference, but it might give you some idea of why the nodes aren’t getting all the properties. Taking it one step further, if they still don’t get all their properties, then maybe recreate one of your blueprints in UE4.4 and the copy and paste that to a text file. Do the same with the UE4.3 version, and then compare the text, to see if you can see what has changed.