Please click on "Help -> TRiLOGI Upgrade" link from your existing i-TRiLOGI and you will be brought to the website to download the latest version (now 6.43).
There are quite a few goodies in 6.43, including ability to define your own name for any variables or expression using #Define table. Syntax highlighting features also make program easier to read and anytime you need help on a keyword or label name just select it and the program will show information about the keyword or the label at the bottom window pane.