How to upload the IUWS block in my block library

Hello,
I´m using WEST 2020 and trying to upload the IUWS block in my block library, but though I select the "WEST.IUWS.BlockLib" as block library when I open a new project, I cannot find it later in my library.
How can I use it?

Thank you

The IUWS BlockLib is correct - in fact, there's now a single block library in WEST.
Which instance have you used for your project? You need to choose IUWS1 or IUWS2 to be able to incorporate IUWS-related block into your process layout.

Hello Enrico,

I changed the instance and it worked.
Thank you!