Can you please let us know which target kit you are not able to select?
You can also refer the below document
When trying to create a new project using a target kit in Creator, the kit's design and examples files must be installed into your computer.
For example here is a link to the CY8CKIT-042 kit https://www.cypress.com/file/502296/download
Here's a link to the PSoC4 kit/eval board info: