Dat file that saves your magic list

If anyone can help me to locate which dat file contains the save for magic spell lists, The game can back up macro and map locations but for some reason does not back up your saved spell list and it can be very annoying having to sort them out if your hdd goes or you have to reinstall.

Interesting... this dev post suggests that spell and ability list sort order is supposed to be saved to the server. I'm not sure which file it is, but I can tell you an easy way to find out, that doesn't require any special tools. Back up your user data files, delete one file, log in and check if your spell list has reset to default. If so, you found the file you want. Otherwise, log out, delete the next file, log back in, and check again. Just keep repeating until you find the right file.