QTR, do you see monsters under every bed? Software drops are not unusual for Sentinel, testing and either accepting or rejecting is also routine and the tweaks being applied have already flown on a similar radar for quite some time.
It really is nothing compared with modifying and fielding the original system. There are other modifications on the platform that provide more programatic risk than this.
I am surprised that any of our aircraft ever get off the ground with such doom-merchants around. Modifying and upgrading mission systems is routine across almost all our operational platforms.