Still need help? There is a way to make it work without changing anything, although this is a pain in the butt.
As soon as the Android SDK manager appears, you will see that at the bottom of the window there are a lot of changes (xml update, etc.) ...
What you want to do is quickly scroll down to the desired flag and click on it BEFORE the SDK manager finishes sampling its data. You will notice that after the manager finishes updating himself, your mailbox will remain on! (if you try to check the box after the manager receives your data, you will not be able to check these fields). At this point, you can click the small arrow to expand the section that you marked, and from here you can further refine the specific elements that you want to set for this section. Of course, this method implies that you may need to restart the SDK manager for each partition that you want to install.
As for the redraw problem ... if you quickly scroll to the end of the window and then go back to where you were, you will notice that this causes the window to redraw (and display updated data).
-I understand that this is not a true “fix”, but it’s an IS way to use the SDK manager. I hope I helped, and I am sorry if my use of the section of words does not make sense.