Originally posted by LouieChuckyMerry: Given that they're installed in the same folder I'd much appreciate more information before I reinstall 18 and check it out. I alwasy use the USB install option, which makes it easy to keep things separate. To import your settings from 12.16 to Opera 18 use a command line switch with Windows Key + R: "<Full path to Opera 18>\launcher.exe" --presto-small-prefs-dir="<Full path to old Opera>\profile" As you read in the link that you gave, Opera 18 is far from complete yet. You could safely ignore it for now, but it's not a bad idea to start getting used to it. Opera 12.16 will become obsolete later, though it is still being maintained, i.e. 12.17 may be released if security updates are needed.