Just updated, yes it now says Build 16
One plus 6, Android 10.
First time I did it I couldn't see the build number, I used the link from my chrome history.
2nd time I scrolled down and found the link in here and it works.
The file size is 12.04 Mb
On my android tablet the app is quite different more like the web page and the download is 11.44Mb and it says build 16 on the drop down menu.
I'm thinking my cached page was a link to an old version??
When you do an update could you include the play store link.