Under Program Options, the Mute program option says that it delays alarms set off while using said program. The only program which can set off an alarm is the Command Program when you use it to command an alarm system to go off, in which case, you probably wouldn't want to delay that.
The term they were looking for should have been Alert, not Alarm.
Secondly, the Shredder option gives you +2 dice on Crash Node/Program Tests with an Attack Program, but SR4a changed Crash Tests to use the Exploit program. Meanwhile, the Crashguard option says that it raises the Threshold of the Crash Program action by an unnamed amount. Seeing as how that's now an Opposed test, this option now has no working interpretation.