[deleted] Edit: Actually I opened a keepass vault once with the default file manager and ticked "Don't ask again" option, so KeepassDX was only opening files from the default file manager, and that's why I thought KeepassDX forces opening an kepass vault via the default file manager when using the "Open existing vault" feature in KeepassDX itself. KeepassDX supports opening an kepass vault from any file manager. KeepassDX only forces the creation of an keepass vault via the default file manager, If you create an database via the 'Create new vault' feature in KeepassDX itself, which you don't have to use anyway. Just creating an file named <file_title_here>.kdbx via your preffered file manager and then opening it in KeepassDX will suffice.