The formatting of the data within TimeClockpro 4 has changed significantly from version 3. Vacation, sick leave are submitted, recorded and tracked in hour & fractional hour increments, time is calculated to the nearest whole minute instead of fractional minutes, overtime is now calculated and more specific PIN specifications are required in version 4. Version 3 was comprised of 3 separate related data tables (time clock data, employee data, messages data). Version 4 includes those data tables as well as new additional tables all combined into a single data file. Because of those reasons and our commitment to ensure the trustworthiness and accuracy of the time clock data, it wasn't feasible to convert, version 3 data into version 4. However, you can keep and we encourage you to retain your TimeClockPro 3 software and it's data as an archive for reference or retrieval of payroll information in the future, should you need it.