That is the latest official release.
I installed a Beta release that had some issues but all was good enough after a few updates.
We thought recently that Zen might have pulled the latest release after a user could not get any updates.
I am guessing nothing to be worried about unless you’re Zen is bricked.
The way I look at it is that it would be a good thing if a couple of us kept these files for safety reasons, just in case the worst happened.
There wasn’t an issue for the longest time but may be one has been introduced.