Yes, it should be fairly easy for them to modify flashchat. You should probably make a post on their forums with the following info.
If they are using group numbers for their permissions :
Old Group Numbering:
1 => Administrator
2 => Moderator
3 => User
4 => Guest
New Group Numbering:
1 => Administrator
2 => GlobalModerator
3 => Moderator
4 => User
5 => Guest
If they are working off the USER_MEMBERSHIP_LEVEL field then here are the different values for that field they need to check for (GlobalModerator being the new one) :
Administrator
GlobalModerator
Moderator
User
