To export individual files, I believe you have to use the "render" function and follow the menus. This way you are assured that your final file will be in the proper sample rate and bit-depth and file type. You also give yourself the option of 'batch' processing which allows you to apply multiple functions at once.
However, as most will chime in, tracking is usually done with CDWAV (freeware) after the original file is mastered.
So take your file, edit, EQ it, apply fades, dither/resample, etc., and then render it to the final format in one big file. Take that file and open it in CDWAV to make your individual tracks. You can then save them in whatever format you prefer, i.e., FLAC, mp3 or WAV. It doesn't mind big file sizes either and it tracks along sector boundaries. It is the tracking program of choice.
Wavelab has a moderate learning curve so be patient. It's pretty scary to the first time user. Hope this helps.