No problem I like troubleshooting and keeping players playing.
It seems it's memory write error.
Access violation: 0xC0000005
The game attempted to write to memory address 0x0000000C, which is invalid for that operation.
AVG and NVIDIA 3D Vision components are loaded
The dump lists AVG's aswhook.dll and NVIDIA's nvSCPAPI.dll. These are worth testing as possible software interactions, but does not prove either one caused the crash.
Test AVG's (anti-virus) interaction with the game
In AVG's settings, add the Aces High III game folder and executable to the appropriate trusted-app or exception settings, following AVG's instructions. Don't disable your antivirus permanently.
Test entering the arena again. If nothing changes, restore the previous setting before moving on.
Check NVIDIA software and overlays
Close optional game overlays and monitoring utilities. If NVIDIA 3D Vision software is installed and enabled, test without its stereoscopic features.
Test entering the arena again.
If no joy
Send the .dmp zip file to HT in email, and make sure the title shows a crash problem