${SegmentFile}

${SegmentInit}
    ${If} $Bits == 64
        Rename "$EXEDIR\Data\<APPNAME>\file.ini" "$EXEDIR\Data\<APPNAME>\file64.ini"
    ${EndIf}
!macroend

${SegmentPost}
    ${ElseIf} $Bits == 64
        Rename "$EXEDIR\Data\<APPNAME>\file64.ini" "$EXEDIR\Data\<APPNAME>\file.ini"
    ${EndIf}
!macroend