I had that effect occasionally, the updater would simply sit there, doing nothing at all. Killing and restarting it does no harm.
If it is downloading, then the file it is downloading will have to be redownloaded afterwards. Also, all files that have not been merged yet will have to be redownloaded later (unless you merge them yourself).
The only thing that might create problems is if you interrupt it while it is merging, since that might corrupt the zip.
IF it does, you may need to delete the zip file and it\'ll just fetch it when you re-run the updater.
But when it\'s just sitting there, it does nothing, so you should be fine killing it.
