windows installer fixes

compilation/installer_server.iss

@@ -84,7 +84,8 @@ end;
 
 procedure CurUninstallStepChanged(CurUninstallStep: TUninstallStep);
 var
-  CustomDataDir: String;
+  CustomDataDir, AppDir: String;
+  I: Integer;
 begin
   if CurUninstallStep = usPostUninstall then
   begin
@@ -94,5 +95,17 @@ begin
         DelTree(CustomDataDir, True, True, True);
       RegDeleteKeyIncludingSubkeys(HKEY_LOCAL_MACHINE, 'Software\LOGAR\LOGAR-Server');
     end;
+
+    AppDir := ExpandConstant('{app}');
+    if (AppDir <> '') and DirExists(AppDir) then
+    begin
+      for I := 1 to 5 do
+      begin
+        if DeleteFile(AppDir + '\nssm.exe') or not FileExists(AppDir + '\nssm.exe') then
+          Break;
+        Sleep(250);
+      end;
+      DelTree(AppDir, True, True, True);
+    end;
   end;
 end;