As a Liquid Rhythm customer can I try Liquid Music before I buy it?

You can download Liquid Music and register a free trial, it will replace Liquid Rhythm but your original Liquid Rhythm license will remain intact. At any time you can uninstall Liquid Music and re-install Liquid Rhythm 1.4.x (or earlier) to revert back to your old license.  You do not need to re-register Liquid Rhythm after doing so.