Here is a link to the required files from my AppData folder:
https://www.dropbox.com/s/8qgklssaobs3mzh/Arma%203%20Alpha.rar
This seems to be the recurring crash dialog:
Problem signature:
Problem Event Name: APPCRASH
Application Name: arma3.exe
Application Version: 0.56.104.778
Application Timestamp: 5181136d
Fault Module Name: PhysX3_x86.dll
Fault Module Version: 3.2.3.1
Fault Module Timestamp: 50f68ef3
Exception Code: c0000005
Exception Offset: 0014237b
OS Version: 6.1.7601.2.1.0.256.48
Locale ID: 1033
Additional Information 1: 0a9e
Additional Information 2: 0a9e372d3b4ad19135b953a78882e789
Additional Information 3: 0a9e
Additional Information 4: 0a9e372d3b4ad19135b953a78882e789
Read our privacy statement online:
http://go.microsoft.com/fwlink/?linkid=104288&clcid=0x0409
If the online privacy statement is not available, please read our privacy statement offline:
C:\Windows\system32\en-US\erofflps.txt