> it was switched to the mode of using the ini file, which now does not exist.
If you are using the INI the menu „Tools – Export Preferences from Registry“ is greyed out. Is it the same on your PC?
If you start todolist with parameter –g (todolist.exe –g) then you get a logfile, where the used INI (if used ..) is described like
Using existing ini file for preferences: C:\Program File........