I have 7000 duties and I want to know how do delete them so I can start again? Do I have to remove them one by one?
From what it seems the software doesn't have a batch function to deleted the entries. In this case you can either delete them one by one or uninstall and reinstall the software. I suggest you use the second solution because it is faster than the first one. After you remove the program from your computer using its uninstaller or Add or Remove Programs feature, run CCleaner or Glary Utilities to make sure that there are no leftover rogue registry keys in your system and reinstall the software.