After upgrading Magento to version 1.3.0 is not anymore possible to change the interface language. Before the upgrade, I installed a german translation and switched into it. Now the interface is in german and no way to go back into english.
I tried to install the English UK version with the hope that maybe this can work but not at all. The installation UK EN was successful but the interface is not switching any language, it remains always as german.
Can anybody out there please help me?
Thank you in advance.