Think I have some more info
When Net7 finishes downloading its updates, on Windows it shuts itself down and reloads. Under wine, it fails to shut itself down, the only way to close the program is to kill the X11. If you then load it again from the terminal, it downloads the next set of updates, but the Net7 program seems to remain as the old version. When all updates are finished, the final version of Net7 is 1.8.1, whereas the current one is 1.9.4.