As of June 2019, the Poser product line is being developed and sold through Bondware and Renderosity.com. Their website for information and to purchase is:

https://www.posersoftware.com

As the developer and distributor for Poser, their team will be able to assist you with all questions about your Poser Product. This includes Activation and application usage as well as obtaining the latest updates and accessing installers. All questions and reports of issues should also be directed to their Support Team

https://support.posersoftware.com

Their Support Team will also be able to assist you in locating your License Key for purchases at the former Content Paradise store or the my.smithmicro.com store.

Additionally, there is an active forum available on Renderosity to ask the community any question you may have.