It is important to keep track of the version and build of ARCHICAD you are running - you will need this information when you log a support ticket and need to track it when using Teamwork (all workstations and the BIM Server must use the same build).
To find out what version and build you are running, go to Help> About ARCHICAD...
Here are some examples showing the version (very clear!) and highlighting the build information:
Version: ARCHICAD 19 FULL (USA) / Build: 5005
Version: ARCHICAD 19 SOLO (UKI) / Build: 3009
Version: ARCHICAD START EDITION 2015 (NZE) / Build: 5003