Export and restore

Hello
I'm on version 9.0.5385.0
Trying to get a local copy gave me some strange behaviours (I Think).

This is what I did:
1. I choosed to Export to a .rde-file since that can have all data included.
2. Next to check my copy I opend the enviroment manager and choosed to Add from file.
3. the file-path only accepts XML and not the RDE file that I exported.
4. Easy solution, rename the file to .xml and hitting Next.
5. A varning "Use Existing file? The specified file already exists. Do you want to use the existing file for the enviroment?"
    - What does that actually mean? I am opening a file for a new enviroment, of course the file exists.
6. Choosing yes
7. Now I have to set a password for my new enviroment
8. Opening the new File-based Enviroment with my set password
9. All Credentials is missing
10. All Connections is still there
11. Adding a Connection and a Credential
12. closing the Enviroment
13. Deleting the new File-enviroment.
14. Adding a new File-enviroment, same varning about existing file
15. the new Connection and Credential is there

Questions:
Why is not .rde a valid file for a new enviroment?
Why do I get the Existing File varning?
Why is not my credentials exported?

/Anders