I have measured reverberation times for different frequencies. How can I use them in EASE? I also ran Schroeder RT in the Probe to simulate. Does EASE use it automatically for the mappings then?

EASE uses the RT values visible in the Room Data Window. This applies to all kinds of sound field calculations where RT values are necessary.
If you want to use other than computed RT's then you would have to insert them into this data sheet. Don't forget to lock them otherwise the program will treat the new data as temporary. So if you have measured RT's or Schroeder RT's enter the data at this location.