Klik supports Knoppix 3.7 and up. You might be able to get some apps to run using older Knoppix versions, but I would expect problems with most apps.

As a temporary, unsupported, inofficial workaround, you can add @2004-02-09 to any klik link, then it tries to be Knoppix 3.3+ compatible, e. g. klik://xvier@2004-02-09 - but that will only install software ftom 2004-02-09.

Greetings,
probono