Please change your user handle from "1125616" to something meaningful. Refer : Video tutorial how to change nickname available
Can I download ORDS 3.0 Production version and do the installation separately to connect to Oracle DB 11.2 XE?
Yes you can. Refer the following blog link and also you can go through the github project OXAR which will automate your environment setup:
- ORA-00001: Unique constraint violated: Installing Oracle XE, ORDS and Apex on CentOS
Oracle XE + Oracle APEX + ORDS + Apache Tomcat is fully open source option for Oracle APEX.
Do I need to pay a license fee for ORDS 3.0 Production ver?
I am using ORDS from version 1 from OTN and I don't think there is license fees for ORDS 3.0 either. But, still to be sure contact Customer Representative at Oracle or better contact My Oracle Support (MOS) for license queries.