| Code | Description | Deutsch (German) | Nederlands (Dutch) | Comment | Version |
| 2.0 | Release 2.0 | Version 2.0, September 1988 | Versie 2.0 | September 1988 | from v2.1 |
| 2.0D | Demo 2.0 | Version 2.0, October 1988 (nur zu Demonstrationszwecken) | Demo 2.0 | October 1988 | from v2.1 |
| 2.1 | Release 2.1 | Version 2.1, März 1990 | Versie 2.1 | March 1990 | from v2.1 |
| 2.2 | Release 2.2 | Version 2.2, Dezember 1994 | Versie 2.2 | December 1994 | added v2.2 |
| 2.3 | Release 2.3 | | Versie 2.3 | March 1997 | added v2.3 |
| 2.3.1 | Release 2.3.1 | | Versie 2.3.1 | May 1999 | added v2.3.1 |
| 2.3.2 | Release 2.3.2 | | Versie 2.3.2 | deprecated | added v2.3.1, removed after v2.3.1 |
| 2.4 | Release 2.4 | | Versie 2.4 | November 2000 | added v2.4 |
| 2.5 | Release 2.5 | | Versie 2.5 | May 2003 | added v2.5 |
| 2.5.1 | Release 2.5.1 | | Versie 2.5.1 | January 2007 | added v2.5.1 |
| 2.6 | Release 2.6 | | Versie 2.6 | July 2007 | added v2.6 |
| 2.7 | Release 2.7 | | Versie 2.6 | November 2010 | added v2.7 |
| 2.7.1 | Release 2.7.1 | | Versie 2.7.1 | July 2012 | added v2.7.1 |
| 2.8 | Release 2.8 | | Versie 2.8 | February 2014 | added v2.8 |
| 2.8.1 | Release 2.8.1 | | Versie 2.8.1 | April 2014 | added v2.8.1 |