Cavity receiver in SAM

In SAM 2014.1.14, the tower model had an option for either a cavity receiver or external receiver. I do not see that option in SAM 2014.11.24. How do I model a cavity receiver in SAM?
We recoded a significant part of the power tower model for SAM 2014.11.24, and did not include the cavity receiver as part of that recoding project. We hope to add the cavity receiver option in the Spring/Summer 2015 release of SAM.
In the meantime, you can use SAM 2014.1.14 to model a cavity receiver. We make all legacy versions of SAM available on the Downloads page. You will need to log on to the SAM website to download a legacy version.
Best regards,

Paul.