For me at least (on my Lenovo G50 laptop, Windows 10 64, Radeon R5 230), I had the same problem when I updated to both 16.5.1 and now 16.5.2
Crimson tells me there is an update, I agree and go through the upgrade process, and at the end of it all, it tells the drivers are successfully updated.
But when I look again at Crimson, it is offering me 'new' drivers in the form of 16.3.2
And when I check what drivers I actually have installed, I am still on 16.5.1, so the 16.5.2 install failed.
I am now uninstalling completely, downloading 16.5.2 the old fashioned way, and installing them myself.
I'm sure this Crimson software will be good when it's finished