About rockmongo path, it has not changed. You need to add the line below into your /opt/bitnami/apps/parse/conf/httpd-app.conf file:
ProxyPass /rockmongo !
Add it just after the line
ProxyPass /bitnami !. Then restart apache executing:
$sudo /opt/bitnami/ctlscript.sh restart apache
We will add this Apache configuration for the next Parse installer.
To access remotely, you need to follow this guide:
About rockmongo issue creating databases, we could reproduce it and we are going to work on fixing it. Thanks for reporting.