Hi Peter,
There might be an easier way, but ! you can upload your files to the Crecorder website, then download them again to your desktop. Once on your dekstop, right click the file and rename it, using the details you want to see but leave the .x431 on the end.
Then open the Crecorder software, then select File then Open, browse to your desktop and select the files you have renamed.

Regards
Dave