YES! You can have multiple libraries. In version 4.9, you could access multiple libraries by settings the “Number of Style Sets” field under the General Settings, then going to the Settings Set section of the plugin to access these different setting configurations.
That being said, I just released version 4.9.1 to change some of this terminology to make it more obvious to new users such as yourself. The setting is now called “Number of Libraries” under the General settings.
Please mark the issue as resolved it it answers your question.