The CapaInstaller console log file contains information and warning messages. Since the CapaInstaller console normally does not have permission to write to the Program Files folder, the log is stored in the user profile.
The log file is located in %APPDATA%\CapaInstaller\Logs\CMS\Console 5.log.
Logs from previous sessions are stored in the %APPDATA%\CapaInstaller\Logs\CMS\History folder.
Use the View menu to access the log file or press F2.