I've had a slew of issues after updating the firmware of my P4. And it seems that the app will not allow me to rollback the firmware for the RC (it didn't save the previous version). The aircraft was able to downgrade, but it won't fly when the controller and aircraft are different versions. Additionally, I've been really disappointed that the DJI Assistant 2 software does not install properly on my Windows 7 Ultimate (64-bit) machine. As part of the installation, it launches a separate executable to install Phantom 4 drivers. The driver installation errors with the following: Runtime (-1:0): Cannot Import REGKEYEXISTS. On Mac OS X, the software isn't offered by a trusted publisher, but it did install after changing the Security settings in Preferences, despite being intended for 10.6 (which is a very old operating system, all things considered). I am running 10.11. Issues I've had since upgrading the firmware: Drone reports that propeller guards are installed. I don't even know what propeller guards are--they sure didn't come with this thing. Drone reports status: Abnormal Video on my device no longer comes through clearly--lots of distorted video and bright colors: http://i.imgur.com/1XQQHMG.png Are others having these issues? Is this typical of DJI or are these issues isolated to my device? If I replace it and opt to not update the firmware, will I be forced to update in the future?