Reading other peoples comments, it seems this application requires too much futzing. And the encryption does not work (at least for me). There should be a "right click -> new -> 7-Zip archive" operation, like most other installed applications do. Right clicking a file does give you a "7-Zip -> Add to file.Zip" option, but this does not ask you if you want to encrypt it. What you want to do is "right click -> 7-Zip -> Add to archive..." which then gives you the option to enter a password. However...
Reading other peoples comments, it seems this application requires too mutch futzing. And the encryption does not work (at least for me). There should be a "right click -> new -> 7-Zip archive" operation, like most other installed applications do. Right clicking a file does give you a "7-Zip -> Add to file.Zip" option, but this does not ask you if you want to encrypt it. What you want to do is "right click -> 7-Zip -> Add to archive..." which then gives you the option to enter a password. However...