So unless you’ve purchased a commercial license or requested an evaluation version of PRO version - you have a Standard one.
In order to check it you can open any js/css file from a package codebase folder, it should start from a comment like following: screencast.com/t/0ZJhft5TmbX - standard version screencast.com/t/cbB06r2TOD - evaluation PRO version
Or check readme.txt from a package root folder, it also contains a version description