[ddouglass]

Final product "Beeps" because this is a Demo version to prevent someone using the Demo to do their work and not paying for the program.
The "Loop" is to use a portion of the song file as a sample to adjust your settings rather than using just the first portion or the whole song for adjusting. Once you have it all set for the amount of vocals you want to remove then you create the final with those settings and it does the whole song.
Keep in mind that this is not an easy beginner task to do, so you may have to make sevearl attempts to get the best balance between amount of vocal removed and how much of the music gets cut too. Working with only two tracks instead of the 16 - 32 tracks that a studio would have with the master copy is a much harder process.
None of the softwares currently available will remove echo or reverbed vocal, but Vogone is the best on the market today for taking out the most vocal.