Hi Tristan,
Can you still open the report in Crystal 2008? If you can, verify the database and in the File menu, make sure Save Data is unchecked.
Try running the report in 2008 and see if you get any errors. Something is different between this report and the others. Is there a subreport or images in the report? What database is this report connecting to?
If you open the report in VS report designer and try to preview the report, does it run or does it crash? What error do you get if it crashes?
I find it interesting that if you delete the report from the directory your application also crashed. What error do you get when the program crashes?
Thanks,
Brian