Yes, that is the link to the current version 51-1.
You can find the hidden link to the latest version if you drag the mouse with the left button pressed just to the right from the link to the official version (just after "Google Play.")

The password remains the same.
There are 3 apk files in the rar. The one with "eink" in the name is the one to try first.
The "nook" is for Nook and the one without any description is for T1/T2.
I am not sure how subtle the differences between them are.