3.3.6 is the Bootware for the M1 panel. In the M1XEP click “FIND” and if the M1XEP is found on the LAN you should see the options Search, Use Selected , “PGM Firmware” and Cancel. If unsuccessful run the “Special M1XEP 2.0.34 Updater Utility” https://www.elkproducts.com/elkdoc/special-m1xep-2-0-34-updater-utility/