Thanks for the reply Mark, as i say, i've only just started dealing with Apache etc, & only just taken over looking after this clients hardware.
1, not sure where information is stored
2, yes, i think mysql is used as the database
3, i don't know how to use phpmyadmin to view the records (never used it before) - Edit - Quick research & found how to view the database - Yes the records from 2014 sales are in the database, but still not available as an option from the drop down box when trying to view by month.
4, the client this is for would have no idea how to access the database to delete any records, they only know how to run the program from the icon on the desktop
5, i doubt there is a backup, they have no backup devices attached to the PC.
My primary concern was having to edit the perl.conf file to make it work, when it all worked fine the day before, with no changes having been made to it.
I'm sorry if this doesn't help much, but this software is all new to me (even though it's been around for years).