You have on the main screen (under the QBE button) a BUILD KEYS button which will open a new TAB for you to BUILD all the Table Keys (TPS encrypted or not Multi Table or not & DAT)

When you click on this button a New TAB opens up :
Use the Close button to close this Tab
Use the Build button to start building all key's of the Table currently opened
You can use the Cancel button during the process and the build will stop at the end of the Current Key
You will have a Progress bar and the name of the Current Key displayed for your information
In case of any errors a logfile is created each time for you (DmcKey.log in cgf_import directory)
At the end of the process you will be informed by a display onscreen
Use the Close button to close this Tab