How to reset the TYPO3 Install Tool password
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Access to the Install Tool from within the TYPO3 backend is only possible for Admin users. It is protected by a special password.
The initial Install Tool password is joh316 (referring to John 3:16).
Introduced with TYPO3 version 4.x, an additional protection had been introduced: To access the Install Tool via the TYPO3 backend, a file named ENABLE_INSTALL_TOOL has to be present in the sub-directory /typo3conf. Since version 4.2.x, this file is deleted automatically by TYPO3, if it is older than one hour.
An alternate way to modify the Install Tool settings is to edit the file localconf.php in the sub-directory /typo3conf directly on the web server. This, of course, is only possible if one has sufficient shell access to the server.
To reset the Install Tool password (to its initial value joh316), you just need to keep the very first entry of $TYPO3_CONF_VARS['BE']['installToolPassword'] (hash value 'bacb98acf97e0b6112b1d1b650b84971') in the file and remove all subsequent entries that have the 'installToolPassword' string.
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