End of Year - Changing Database file name

Question - what should I have done to change the name of my Reckon datafile at 1/7/23.

Front screen and report headings are still showing 22-23 YTD - thought it would automatically change to 23-24 come 1st July ? Back-Up still shows file name "22-23 YTD.QDF".

Have tried the File Operations - Rename, but does not rename the file - says it can't find the selected file.