When modifying an existing value (Event Log Size) in the a protected GPO eg domain controller policy, you get an access denied to the inf. file,
At the Same time a temporary file will be created and the existing one with values will be cleaned up. Thus wiping all settings in the GPO
Resolved in the following versions of ChangeAuditor
126.96.36.1999 - GPOs protected by Change Auditor, will no longer function properly if their settings are modified.
6.9.2 - The fix is not listed in resolved issues but tests show the issue is resolved