reetings,

I need to update the system and can not remember the key to install tools.

I have tried to change the key directly into the file localconfig.php but unable to function.

What can I do?

Thank you very much for your help

Which value did you change ?

I am still a TYPOlight beginner so this has to be confirmed but I think if it's $GLOBALS['TL_CONFIG']['encryptionKey'] you edited the wrong value, but you should be able to regenerate one once you reset the install tool password.

You should be able to reset the install tool password by changing the $GLOBALS['TL_CONFIG']['installPassword'] value. Be aware that you'll need to use an SHA-1 generator (it's the encryption used for the password) to set the value, you can download a script here (or do it online here for example, at your own risk).

Maybe someone can recommend another (better) tool, just Googled it.