Group Manager broken? (Urgent)

Well everything is fine and well. I go into McMyAdmin and touch this cool little shiny button that says "Permissions exporting" and I put it to group manager and BAM! Everything is all f***ed up. I can't do anything, not even /manload. Please help this is horrible I can't do anything besides /pl

I pasted the errors for group manager here:
http://pastebin.com/uzG2aaNu

And If it's possible I would like to save my groups because I made them perfect and it took a while to do :S

 

this is why i advice to never use a UI that tries to make its own permissions editor.
paste your groups.yml, the error could be fixed easily but to revert the structure to easy to read one would be harder.

 

The error is pretty self explanatory. You've got no default group.

You need at least 1 group with "*" as a member, and that group must apply to all worlds.

Also I hope you've got a backup if you hand-wrote permissions, because exporting erases your current permissions. Hence why you get a massive full-screen warning entitled "Data Overwrite Warning"