Please understand that I can not offer personal support. However, I can help you to find a room acoustician in your vicinity.
Support for the CARA software is unfortunately no longer available from its developers since mid-2017. I just took over the domain cara.de.
Editorial work and programming:
Dr. Jörg Hunecke
Vordere Seestr. 2 a
+49 - 8143 - 999 64 86