This bug has been fixed a long time ago in more recent versions of Mnemosyne.
As a workaround, delete the file 'config' in Mnemosyne's configuration directory (typically ~/.config/Mnemosyne )
This bug has been fixed a long time ago in more recent versions of Mnemosyne.
As a workaround, delete the file 'config' in Mnemosyne's configuration directory (typically ~/.config/Mnemosyne )