You will see this screen when you select "Help > Register..." item from the Main Window's menu.
You should enter this dialog only after you have received an email or letter from Everstrike Software with your license information. If you do not have it yet, please click on Cancel button.
Your license letter will list your "Key" value, which consists of 4 parts. Please enter each part without dashes in a separate field of the dialog box.
Please enter all strings exactly as spelled in your license letter from Everstrike Software. The most common mistake is confusing 0 (zero) and O when typing the code.
The easiest way to enter your registration code correctly is to copy each part of the Key to the clipboard (select it with the mouse and press Ctrl+C) and then paste it into the appropriate edit box (using Ctrl+V).
After entering the registration code, in most cases, you may just click on OK button and restart Lock Folder XP. If all was entered correctly, the word "Unregistered" disappears form the title of the program and from the About dialog.