Yes, this is a beta version of software. If you select TRY, then you don't have to enter a serial number. This should make it easier for you than dealing with a serial number during your use of this software. When signing up for an Adobe Id, you will enter your email and also have access to other Adobe features. You will be able to "continually assess" this software until the final version is shipped.Please see the links below regarding serial number and Adobe Id.
Thanks. Enjoy the free trial and let us know if you see any issues.