This configuration variable applies only to the thin client automatic update feature. You use the TC_INSTALLER_RUN_ASYNC configuration variable when you want to prevent the thin client from restarting after an automatic update, or when your installer file handles the automatic update process to completion. When you set this variable to "1" (on, true, yes), the thin client starts the installer process asynchronously and then exits immediately. It does not wait for the automatic update process to complete and does not restart the application. The default value is "0" (off, false, no).
See Accepting the Automatic Update for more information about this variable.