Registration Key Having registered Help Development Studio, you receive the registration key, which should be entered at the program. For it, do the following: Run Help Development Studio. If your trial period has not expired, choose the Enter Registration Key command from the Help menu. Otherwise, if your trial period has expired, click the Register button on the appeared window. Copy the key from your registration confirmation letter and paste it at the dialog box. Click the OK button and restart Help Development Studio. Also, we recommend you to save your registration confirmation letter on your hard disk for usage in the future. Note: Please do not distribute your registration key and do not let somebody copy it. Otherwise, as stated in the license agreement, if your key is published anyplace, your license on usage of Help Development Studio will be terminated. Lost your key? If for any reason you have lost your registration key, just contact us from the e-mail address inputed in the form when registering Help Development Studio and we will resend it to you.