If you buy Rosetta stone is it possible to copy it to another disk also iv herd that you can download it on multiple computers but you cant use it on both computers at once is that true?

If you buy Rosetta stone is it possible to copy it to another disk also iv herd that you can download it on multiple computers but you cant use it on both computers at once is that true?
I don't know where you heard that from but you can not make multiple copies because of Copyright laws you could download but that would be illegal and prevents less money for the people who make the programs and they would eventually have to shut down.