May I suggest to make the update process a little more straightforward?
Currently (I'm talking about 1.5) you have to:
1) click the "update" button;
2) click "search";
3) choose a server and click "continue";
4) select the items you want to download an click "donwload";
5) wait (BTW, does the "cancel" button now work? it didn't in 1.4);
6) click "exit".
Now, IMO steps 2 and 3 should be avoided, and the recommended/important updates (those generally marked with a ! - BTW, maybe something more flashy/visible, like bold or red?) should be selected by default.
In other words, I think the options should be set in the configuration (or only asked the first time), and then the update process should work as follows:
1) you click the "update" button;
2) you get the list of available updates, check that the items you want are selected, and click "download";
3) wait;
4) click exit.
On another note, I'm using the Italian language, why does it keep notifying me English-language updates? Who cares?
And does it show Italian-language updates, or doesn't it?
Finally, of course, it would be awesome to have automatic updates as an option.
Well, just expressing my ideas here, hope this helps.
Any other opinion on this?
PS: ah, great work! Keep it going!