[horde] adress book dont exist

[Ralf]

Hi,
my Plesk (v.12.0.18 of Ubuntu14.04.2 LTS) has made self-acting an  
upgrade from horde webmail 5.2.1 to 5.2.9 (the horde logo shows 5.2.6)

- on start I get the message: "Das Adressbuch xxxxxxxxxxxxxxxxxxxxx  
existiert nicht." (dont exist)
    the standart adressbook is available but:
- in all contacs: name = "leerer Name" (empty name)
- there no entrys in my calendar and in notices
- the language are 50% english and 50% german

can I repair this?

I have restore an server backup, without success.

I think now its time to install horde groupware in a different folder,  
manually without plesk. Can I transfer the (hopefully restored)  
settings and contents in the new installation?

many thanks
Ralf