Hi WakeupGFX,
While checking the different versions, only the Studio showed the new Shadow Catcher option.
The Comparison chart gives a clear information about:
https://www.maxon.net/en-us/products/infosites/product-comparison/
Only Studio
The help content tells me otherwise:
https://help.maxon.net/us/#MSHADOWCATCHER
(see headline.)
Which is a 2:1 result and I go with the Studio only statement.
Sorry about your time spend, this information should have been in the tutorial or in its overview text.
Shadow catcher themes by itself where discussed earlier for all versions. (Some are currently not available, but soon).
All the best