MacUpdate tells me there is an update to v39.96, but when I use 39.94 to check for an update it says there isn't one.
The last mention of an update on your site was August 20, 2015, but then accessing the ChangeLog does show the update and downloading results in an updated version.
We have a few minor updates posted! You are welcome to download them.
We usually post each new build as the main download for a few weeks, and then, we only push updates when they are likely to make a difference for a lot of people. (I wish our updater had a way to note that a minor update was available, but it doesn't yet.)
Anything special for the release number 40.0?
I hope so. There is a lot left to ship.