There are two Cashculator versions on Mac App Store: Cashculator+ and Cashculator (paid). Cashculator+ is a limited version with in-app-purchase capability, allowing users to upgrade to full version from within the application.
Still, if for some reason you have purchased regular Cashculator after using Cashculator+ and would like to transfer the data you have created on Cashculator+ to Cashculator, you should follow the instructions below:
Quit both Cashculator applications, if running
Open Cashculator+ database folder:
It should be at
If you don't see your [user home]/Library folder in Finder (OS X often hides it), navigate to the target folder by pressing Cmd-Shift-G in Finder to open the "Go To Folder" dialog and enter the path ~/Library/Containers/com.apparentsoft.cashculatorfree/Data/Library/Application Support/cashculator there.
Open your new Cashculator database folder:
Copy files whose names start with "CCDB" (Cashculator database) from old folder (2) to new folder (3)