ddj sx

hello, this is michael! 

i bought an ddj.sx a few years ago with serato in bundle. but i now want to use recordbox dj instead. is it possible to buy a licence for the program, as u get it in bundle with any other recordbox controllers. on the webside its only possible to get a licence without bundle due to subscription.

but i would prefer to buy it at once, so my question: is there a way to do so? 

thanks for help!