Hello George,
It gets the EZX10RF address by looking for Model: EZX10RF listed in the Edit Device window. I changed the app today to not be so fussy in looking for the EZX10RF in case it is listed slightly different for different firmware releases. Previously it looked for the complete model name now it looks only for the EZX10RF in the model description. Also if it can't find the EZX10RF it displays "device not found" in the window and it should now load the address when the app is opened. Try the latest build b3 and let me know the results. If you are still having a problem after trying b3 I'll send you a script to run to see if it finds your EZX10RF address. Feel free to contact me on iChat at myred998.
http://www.duc.scrapping.cc/home_auto/ezfilter.shtml
What Indigo release are you using and what OS X version.