Create a fresh Miranda NG set up with all the plugins that you like, then you should create empty profile on Miranda NG and then perform import from your Miranda IM without even creating any accounts on NG (this way new and improved Miranda NG import will transfer your accounts including logins and passwords in 2 clicks).
Post Merge: 24 04 2015, 07:13:27
Or - if you keep the profile folder inside main Miranda IM folder and not in AppData - you can just make a copy of your Miranda IM setup and then use the migration plugin.
Both ways would work - choose the one you prefer.