photomarathon.xml contains the entire database stored by Photo Marathon in an easy to use XML format.
photomarathon.sqlite is the main database of Photo Marathon. It is re-read on start up to ensure that your data remains persistent. It is a good idea to store an offsite backup of this file.
Competitor-Topics-XXXXX.pdf are files created for each competitor, including their contact details, their randomly assigned topics, the location of the delivery point etc.
Competitor-Returns-XXXXX.pdf a PDF file showing the images the competitor returned alongside metadata including topic name, date and time, camera.