Open the application and press the Delete button next to the Update option. Enter the profile Username and Password, type please delete this profile in the Confirmation phrase field and press Delete. If this doesn't work, try to completely uninstall the application using Add or Remove Programs Feature:
If you use Windows XP or bellow you can go to Start > Control Panel > Add or Remove Programs. In the Currently installed programs box, click on the My Journal program and then click Remove.
If you have Windows Vista or above you need to go to Start > Control Panel > Programs > Programs and Features. Select the My Journal application and click on Uninstall.
After that, run AdwCleaner 2-3 times in a row to make sure that there are no leftover rogue registry keys in your system. You can download and install a new copy of the software from the official web page.