hotfix: attempting to use menu buttons when there were no snirf files present...

    set(maingui.handles.pushbuttonCalcProcStream, 'enable', val);

    set(maingui.handles.pushbuttonProcStreamOptionsEdit, 'enable', val);

    set(maingui.handles.checkboxApplyProcStreamEditToAll, 'enable', val);

    % Menu

    set(maingui.handles.ToolsMenu, 'enable', val);

    set(maingui.handles.ViewMenu, 'enable', val);

    set(maingui.handles.menuItemSaveGroup, 'enable', val);

    set(maingui.handles.menuItemExport, 'enable', val);

    set(maingui.handles.menuItemReset, 'enable', val);

    set(maingui.handles.menuItemResetGroupFolder, 'enable', val)

end

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