Monthlyalltime.ini
Introduced in version 1.9.3 to support the Monthly Records (i.e. the extremes recorded in all January periods, all February periods etc).
Update the monthlyalltime.ini by choosing all time records from the Edit menu in Cumulus. This is a text editor, and works best when at full screen. By clicking the appropriate buttons, you can get Cumulus to display the extremes found by looking through all the data available in dayfile.txt for the selected month in all years, and all the data available in Monthly log files for that month in all years. Click the Help button on that screen for detailed instructions on how to copy figures across from log to log or to directly edit them on screen.
For more information on this file see in the Cumulus help file, in the section “Data log file format”. See also FAQ: FAQ#How_do_I_correct_my_all-time_.28or_monthly.29_records.3F and FAQ#I_can.E2.80.99t_find_my_data_files.21.