I was attempting to bind Mouse Up and Mouse Down to invert the helicopter controls. After removing "Mouse Up" or "Mouse Down" and attempting to drag the opposite over to the proper field, the game immediately crashes to the Desktop. I am including the MSINFO crash lines below:
5/9/2013 1:54 AM Application Error Faulting application name: arma3.exe, version: 0.56.104.778, time stamp: 0x5181136d
Faulting module name: arma3.exe, version: 0.56.104.778, time stamp: 0x5181136d
Exception code: 0xc0000005
Fault offset: 0x0096cdfb
Faulting process id: 0x1acc
Faulting application start time: 0x01ce4c542bf4ebd6
Faulting application path: C:\Program Files (x86)\Steam\steamapps\common\Arma 3\arma3.exe
Faulting module path: C:\Program Files (x86)\Steam\steamapps\common\Arma 3\arma3.exe
Report Id: 67bc03db-b84b-11e2-8af8-bcaec5e01066
5/9/2013 1:54 AM Windows Error Reporting Fault bucket , type 0
Event Name: APPCRASH
Response: Not available
Cab Id: 0

Problem signature:
P1: arma3.exe
P2: 0.56.104.778
P3: 5181136d
P4: arma3.exe
P5: 0.56.104.778
P6: 5181136d
P7: c0000005
P8: 0096cdfb
P9: 
P10: 

Attached files:

These files may be available here:
C:\Users\MYNAME\AppData\Local\Microsoft\Windows\WER\ReportArchive\AppCrash_arma3.exe_2d36f34cee6eccb721985c1617f1297b4471d0_1d2edea1

Analysis symbol: 
Rechecking for solution: 0
Report Id: 67bc03db-b84b-11e2-8af8-bcaec5e01066
Report Status: 0
5/9/2013 2:02 AM Application Error Faulting application name: arma3.exe, version: 0.56.104.778, time stamp: 0x5181136d
Faulting module name: arma3.exe, version: 0.56.104.778, time stamp: 0x5181136d
Exception code: 0xc0000005
Fault offset: 0x0096cdfb
Faulting process id: 0x1794
Faulting application start time: 0x01ce4c590ac967a2
Faulting application path: C:\Program Files (x86)\Steam\steamapps\common\Arma 3\arma3.exe
Faulting module path: C:\Program Files (x86)\Steam\steamapps\common\Arma 3\arma3.exe
Report Id: 704a3597-b84c-11e2-8af8-bcaec5e01066
5/9/2013 2:02 AM Windows Error Reporting Fault bucket , type 0
Event Name: APPCRASH
Response: Not available
Cab Id: 0

Problem signature:
P1: arma3.exe
P2: 0.56.104.778
P3: 5181136d
P4: arma3.exe
P5: 0.56.104.778
P6: 5181136d
P7: c0000005
P8: 0096cdfb
P9: 
P10: 

Attached files:

These files may be available here:
C:\Users\MYNAME\AppData\Local\Microsoft\Windows\WER\ReportArchive\AppCrash_arma3.exe_2d36f34cee6eccb721985c1617f1297b4471d0_1ed59fce

Analysis symbol: 
Rechecking for solution: 0
Report Id: 704a3597-b84c-11e2-8af8-bcaec5e01066
Report Status: 0
5/9/2013 2:53 AM Application Error Faulting application name: arma3.exe, version: 0.56.104.778, time stamp: 0x5181136d
Faulting module name: arma3.exe, version: 0.56.104.778, time stamp: 0x5181136d
Exception code: 0xc0000005
Fault offset: 0x0096cdfb
Faulting process id: 0x14a0
Faulting application start time: 0x01ce4c60155630a4
Faulting application path: C:\Program Files (x86)\Steam\steamapps\common\Arma 3\arma3.exe
Faulting module path: C:\Program Files (x86)\Steam\steamapps\common\Arma 3\arma3.exe
Report Id: 94f5c742-b853-11e2-8af8-bcaec5e01066
5/9/2013 2:53 AM Windows Error Reporting Fault bucket , type 0
Event Name: APPCRASH
Response: Not available
Cab Id: 0

Problem signature:
P1: arma3.exe
P2: 0.56.104.778
P3: 5181136d
P4: arma3.exe
P5: 0.56.104.778
P6: 5181136d
P7: c0000005
P8: 0096cdfb
P9: 
P10: 

Attached files:

These files may be available here:
C:\Users\MYNAME\AppData\Local\Microsoft\Windows\WER\ReportArchive\AppCrash_arma3.exe_2d36f34cee6eccb721985c1617f1297b4471d0_1048717f

Analysis symbol: 
Rechecking for solution: 0
Report Id: 94f5c742-b853-11e2-8af8-bcaec5e01066
Report Status: 0