Updating products - problem??

Hello!

I'm trying to update several of my products.

With the new tool is mandatory to use all the fields even if we don’t need them? I've read the manual and seemed that if I kept the header line it should recognize the field, am I right?

What I did:

- Exported the products;
- Deleted all the columns that I didn’t want to change;
- Change what I needed.

When I use the new method it doesn’t recognize the fields and it shows all of them.

I’ve also tried the “old import” and it gives me the message “Cannot update products from this CSV file”.

Am I doing it wrong with this new version?

Thanks in advance!

Sónia