I tried editing the CORS configuration from /system/console/configMgr. Once i save the changes, noticed the following file getting created under crxde:
/apps/system/config/com.adobe.granite.cors.impl.CORSPolicyImpl-122113ad-1f51-4b73-9c4f-ba1c0d2f1395.config
Have you tried updating the configuration from /system/console/configMgr ?
In another test, I installed the copy-pasted the "com.adobe.granite.cors.impl.CORSPolicyImpl-122113ad-1f51-4b73-9c4f-ba1c0d2f1395.config" and changed the PID and can see the configs under CORS:
So, check the syntax as you should only be changing the PID number (122113ad-1f51-4b73-9c4f-ba1c0d2f1395) for example