I will try to explain the difference once again.
In the new class type system you can select 'Assets', 'Liabilities', 'Equities', 'Income', 'COGS', 'Expense'. But you dont have to use all of them.
If you want to use it as before, you can for instance only use 'Assets', 'Liabilities','Income' and 'Expense' as is presented on the demo site.
Instead of marking the class with 'Balance Sheet' as before, you now select either 'Assets' or 'Liabilities'. It should be fairly easy to figure out which. And instead of unmarking the 'Balance Sheet' you select either 'Income' or 'Expense'. Again it should be fairly easy to set.
That's all there is to it.
By setting up the Account Types (Groups) you tell FA in which order inside a class you want to present the reports. This is similar as before.
This new implementation has nothing to do with any standards.
You can retrieve the same reports as before. If not, tell me which reports are not able to retrieve as before. And I will try to show you how.
/Joe