1: Go to C:/JTS/ and open the file named 'jts.ini', if the 2nd last line in that file is 'Peer=gw1.ibllc.com.hk:4000', your account is on HK. IF it is ''Peer=gw1.ibllc.com:4000', then your account is on US.
2: In the same folder, there are log file from Mon to Fri. Open any one of them...