First the zip archive was missing the library folder so if you uploaded it as per the instructions you will receive errors.
If you did that please go to your forum root and delete the 'CTA' directory which should have been in the library folder.
At this point uninstall the addon, grab the update follow the instructions.
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You must now check an on/off box in the options and save in order to activate the timer. This prevents the errors that Adam pointed out show up when installing and not setting and saving a date.