Compatibility Compatibility of KeePass editions.

KDBX files created by KeePass 2.x and KDB files created by KeePass 1.x are not compatible. KeePass 2.x supports a lot of features, which 1.x doesn't support, therefore these formats are incompatible.

But KeePass 2.x can import KDB files created by KeePass 1.x. For this, you need first need to create a new database in KeePass 2.x and import the 1.x database using 'File' -> 'Import'.

By 'File' -> 'Export', KeePass 2.x can also export data to 1.x KDB files. However note that not all 2.x fields are supported by 1.x (i.e. the export is lossy).