Hi there,
Yes, sorry for the inconvenience. Rob Lanfear, the author of the code has merged the next version, partitionfinder3, into IQTree2.
But you can use it in CIPRES, you just run it as an option in IQTree2.
Here is a tutorial for IQTRee that describes using Pfinder3 in IQTree
Let me know if you have trouble using it.
Mark