How to clear user's app data folders with Inno Setup?

Question

When I uninstall my app with my Inno Setup uninstaller, the runtime files created in the user's AppData folder remain. Is it possible to remove them?

Answer 1

you can create a CurUninstallStepChanged routine to perform any custom action you want, like deleting files on the system during uninstall.

Take a look at this example (from this question):

procedure CurUninstallStepChanged (CurUninstallStep: TUninstallStep);
var
  mres : integer;
begin
  case CurUninstallStep of
    usPostUninstall:
      begin
        mres := MsgBox('Do you want to delete saved files?', mbConfirmation, MB_YESNO or MB_DEFBUTTON2)
        if mres = IDYES then
          DelTree(ExpandConstant('{userdocs}\MyApp'), True, True, True);
      end;  
  end;
end;