TC has just published the latest PowerCore software release v4.3.3. 
This will be also the last software release for this product discontinued in 2011. 
http://www.tcelectronic.com/powercore/support/
Don’t forget the definitive closedown on November 30, 2014 
http://support.tcelectronic.com/entries/70002697-PowerCore-Backing-up-licenses-to-prepare-for-account-close-down-November-30-2014-
Cheers,
Bernard