How to access Substance Assets library with Substance Painter steam version?

Hi. I have bought Substance Painter on Steam and am using it since a few weeks. However, I would like to have access to the Substance Assets library (for example, they are being used in tutorials that I can't follow without it). I tried to figure out how to be able to access the premium materials, but for those I need to subscribe to ANOTHER substance painter version/subscription. This surely can't be right? Is there a subscription model for just the asset library or a possibility how to access it with the steam version? Thank you!