Reloaded and found that file. It contains:
Traceback (most recent call last):
File "BugEventManager", line 363, in _handleDefaultEvent
File "ANewDawnSettings", line 32, in onGameStart
File "ANewDawnSettings", line 39, in optionUpdate
File "ANewDawnSettings", line 299, in setXMLOptionsfromIniFile
NameError: global name 'changedInfrastructuresIgnoresImprovements' is not defined
WOW:
There are over 4000 logs in that folder, from 2010: I assume it is safe to delete them all. Did not even know it existed. Neither do the cleanup programs I use.