Encrypting a single file is very easy. First locate the file you wish to encrypt and "Right Click" it. Then choose "128Gamma Encryption" from the "Context Menu". A dialog will appear asking for a password, Simply enter a password and click OK. These are the same steps to follow to Encrypt & Decrypt files using 128Gamma.
Windows Context Menu
Above is the windows context menu, It contains common commands & shortcuts. It pops up when you right click on a file. NOTE: Your context menu may slightly differ from the above image.