I have absolutely no idea how to use this site, so if I am not in the correct place please tell me where to go.
Not literally though. I have some data in the format .an1 and want to convert it to .csv or .GPX or .ITN
Can anyone tell me if there is a program that will convert my .an1 files?
Quick googling for solution provides links to GPSBabel (distributed under GPL). There’s also web interface for the tool available.
You might want to play with that 
Hopefully that resolves your issue.
(disclaimer) I have no experience with AN1 files.