Updated the guides to use the `bib` key.

\usepackage{minted}

\usepackage{ltxcmds}

\usepackage{tabularx}

\usepackage[

  backend=biber,

  style=numeric,

  citestyle=numeric-comp,

  sorting=none,

  sortlocale=auto

]{biblatex}

\addbibresource{guide.bib}

\makeatletter

\thesissetup{

  title=A fithesis3 user guide for the \thesis@english@facultyName,

  TeXkeywordsEn=\thesis@TeXkeywords,

  abstractEn=\thesis@abstract,

  faculty=\jobname,

  bib=guide.bib,

  autoLayout=false}

\thesislong{abstract}{%

  \textsf{Fithesis3} is a \LaTeX{} document class, which

  \textsf{fontspec}, \textsf{unicode-math}, \textsf{mathpazo},

  \textsf{tex-gyre-pagella}, \textsf{lm}, \textsf{cmap},

  \textsf{fontenc}, \textsf{tabularx}, \textsf{tabu},

  \textsf{booktabs}, \textsf{csquotes}, \textsf{fithesis}.

  \textsf{booktabs}, \textsf{csquotes}, \textsf{biblatex},

  \textsf{fithesis}.

  {\makeatletter %% A placeholder string macro

  \def\thguide@placeholder#1{$\langle$\textit{#1}$\rangle$}

        \ldots

      \end{center}

%</econ,fi,fss,law,sci>

    \item[bib]

      This key can be used to specify a list of BIB files

      containing the bibliography databases. The list should be in

      the following format:

      \begin{center}

        \texttt{path/to/first/file.bib, path/to/second/file.bib,}

        \ldots

      \end{center}

      When this key is specified, the \textsf{fithesis3} class will

      also automatically typeset a bibliography section. If you

      want more control over where and how the bibliography is

      typeset, use the

      \mintinline{latex}{\printbibliography[bibintoc]} command.

      When the key is not specified, no bibliography will be

      produced, which provides the opportunity for the advanced user

      to set up their bibliography management manually.

  \end{description}

  Apart from the single-paragraph \mintinline{latex}{\thesissetup}

  command, the following keys can be configured with multiple