Administration > Environment Variables > APTLOGDIR — Specifying the Location of the Log Files
  
APTLOGDIR — Specifying the Location of the Log Files
Changes the directory in which Arbortext Editor stores various log files generated in Arbortext Editor. This value will be used only if the directory exists.
The default location of the log files is Users\<user>\AppData\Roaming\PTC\Arbortext\Editor\logs.