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 first need to create a new database in KeePass 2.x and then 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).