Last Version For Phprunner 5.x

Hi guys.

I have PhpRunner 5.3(Build 7474) but I don't know if this is last releases for version 5.

Where can I check it?

On the official site I can find only information about last version (v.6)
Thank in advance
EDIT:

Now I have found this topic to check the releases:

http://www.asprunner.com/forums/forum/26-asprunnerphprunner-change-log/