Detecting version used
Navigate to login page of your Aurora Corporate 8 installation and once the page is opened, view its source code (e.g. Ctrl-U in Mozilla Firefox). At the bottom of the code, you should see something like:
<!-- 8.1.4 -->
This means that Aurora Corporate 8 version 8.1.4 is installed.
Alternately, if you have filesystem-level access to the installation, check VERSION file in root directory of Aurora Corporate 8 installation, it contains the version number.
Another way to check that in Aurora Corporate 8 is to log in as superadmin and open 'About' tab of admin interface, you should see something like:
About
Name: Afterlogic WebMail Pro PHP
Version: 8.1.13-build-a3