10/1/15 Update...

Due to Apple's sanboxing restrictions, it is not possible for Carnation Software to submit upgrades to the Mac App Store. Our attempts to submit upgrades have been rejected by Apple.

Upgrades from version 12 to version 15 can be purchased from the Carnation Software web site for $59.00.

http://www.carnationsoftware.com/carnation/Final_credit_card.html

If you want to download the current version 15 and try it out, the link is here...
MacWise Demo . Make a backup of your version 12 MacWise app before installing the demo.