Hmm, the words can be changed in the Settings / Terminology window. It may have been erased and you could change it back. Or, you can reset the terminology file back to default. To do that:
1 - open the Help window and click on the Database link.
2 - A window will open. Quit the ezPower program.
3 - In the window that remains open, open the ezp folder and find the Trmlgy.ezp file.
4 - Drag that file out and restart ezPower. All the words will be returned back to the default.