Please upgrade to 2.3 here.
The 2.2 and earlier branches are no longer being updated.
[Solved] Upgrade to 2.1.8b2 Overwrite files
This discussion is related to the Vanilla
Tim, you said....
If you can, instead of simply copying the new files over the old files, delete your original files first (everything except conf/, cache/, uploads/, custom themes/and custom plugins/ and *then* copy the news files. This will ensure that any files we've removed from Vanilla in the updated version will not stick around in your installation.
Does this mean I should NOT overwrite the above directories?