I use carbonite for some time and with fun
now happens that it is telling me for one week now that there is a new update
and everytime i get here, i see the one i already downloaded... quite annoying..
and it won't remember what quests i've done anymore
The second sticky at the top of this forum has a link to the carbonite website, on whose main page (near the bottom) are links to three versions of the addon, 4.031, 4.032004, and 4.032005. The first was the last release version, the other two are the most recent betas. You want to download the latest one.
BTW, that sticky thread's first post was updated to reflect the availability of that latest version two and a half hours before your post.