Installation log files for AC server:

%ProgramFiles%\Trend Micro\Endpoint Application Control\ACServerInstaller.log
%ProgramFiles%\Trend Micro\Endpoint Application Control\Trend Micro Endpoint Application Control Installer.log

Other log files for AC server (configuration, logs, server data):

...\Trend Micro\Endpoint Application Control\AcServer-Data

Installation log files for AC Agent:

%TMP%\AcAgentSetup_{x64/x86}.txt (example is C:\Users\Administrator\AppData\Local\Temp\ACAgentSetup_x64.log)
C:\Program Files\Trend Micro\Endpoint Application Control Agent\ac_logs\AcAgentService.log
C:\tmuninst.ini

Other log files for AC Agent:

...\Trend Micro\Endpoint Application Control Agent\ac_logs

Database files on AC Agent:

C:\Program Files\Trend Micro\Endpoint Application Control Agent\ac_data