: Many users found that uploading from the OpenTX Companion would seemingly "corrupt" the EEPROM, throwing a scary warning message.
OpenTX 2.1.9 is the final and stable release of the OpenTX 2.1 branch . While it is now a deprecated version, it remains the recommended firmware for AVR-based radios opentx 2.1.9 download
Note: Windows XP users may need to install the Microsoft Visual C++ 2008 Redistributable to run the simulator. Why OpenTX 2.1.9 Matters : Many users found that uploading from the