Dynamics GP Support Blog confirms that the Professional Services Tools Library (PSTL) is now available for all, free of cost.
BUT, all Customers should contact their Partners to get this tool. Once installed, it would generate the registration key by default and you are good to use it.
PSTL has been a great tool with top notch features to solve real time issues. With this becoming free to use, customers should make use of this.
VAIDY