1.2 mingus is the one.
Upgrading:
# First, backup your database.
# Backup all those files that you have modified. This may include – but is not limited to – index.php, wp-layout.css, wp-comments.php. If you are in doubt, backup all the folders in your WordPress directory to your computer.
# Delete all the WordPress files from your WP directory. If you have other files / folders in there (such as a folder for images), do not delete those.
# You do not have to delete a€?wp-config.phpa€? – this information will remain the same.
# You do not have to delete a€?wp-layout.cssa€? but ensure that you do not upload the same file from your new WP.
# Upload the new WordPress files.
# Run the upgrade script i.e. https://www.example.com/wp-admin/upgrade.php
Do not use the index.php that you had with 1.0.1 – there have been changes. You’ll have to use the new index, then copy over any changes you made.