Technically, the USPS module should work. The updated released for January 26, 2014 has minor corrections for miscellaneous issues that have been reported since the July 28, 2013 J5 release in addition to the changes for new services that USPS has added.
While it is up to you what to do, we do recommend staying up to date with current releases.
A new release does not require much more than loading the new files on to the server and doing a REMOVE, INSTALL and re-configuration of the USPS shipping module ...
Linda McGrath
If you have to think ... you haven't been zenned ...
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