How to change the record name of Run-Time Parameter with Level 2 MATLAB S-Function in model.rtw

I use Level 2 MATLAB S-Function masked with 4 parameters to generate code as following steps:

1.Set 4 Turnable Parameters as Run-Time Parameters in Leve 2 MATLAB S-Function.

% Register paramter
block.NumDialogPrms =4;
block.DialogPrmsTunable = {'Tunable','Tunable','Tunable','Tunable'};
%
function ProcessPrms(block)
block.AutoUpdateRuntimePrms;
%endfunction
%
function DoPostPropSetup(block)
%Register all tunable parameters as runtime parameters.
block.AutoRegRuntimePrms;
%endfunction

2.Record of Run-Time Parameters in model.rtw like this:

   Parameters        [4, 4]
      Parameter {
  Name      " MSFcnParameter1"
  ASTNode {
    IsNonTerminal      0
    Op        SL_INLINED
    ModelParameterIdx    0
  }
  Value      [1.0]
  ContainerCGTypeIdx  19
  String      "FcnSel"
  StringType    "Expression"
      }

• Q1:The question is that how can I change the recoord name "MSFcnParameter1" to "FcnSel"?
• Q2:When I change the value of Non-Turnable Parameter and regenerate code, I must input the following command-line in Command Window or delete the slprj folder. Otherwise, the build process will omit regeneration. (It is a bit troublesome.)

    rtwbuild('MFcn_model','ForceTopModelBuild',ture)
(web(fullfile(docroot, 'rtw/ug/control-regeneration-of-top-model-code.html')))