Here's from the "Read me"
The setup file will install VST3 and AAX plugin versions on your system.
The plugin relies on content downloaded by the IAConnect tool. Build you have to
specify the IAConnect download directory in the Inspirata plugin.
After loading the plugin, open its graphical interface and open the SETTINGS
panel by clicking on the cog icon near the top right corner of the interface.
Here you can find a list of directories. In the list's lower left corner you
see a + and - button. Press the + button and select your IAConnect download
directory.