Let's call this High Quality instead of Ultra Quality. Ultra is a bit hyperbolic in this case.

Assets/Scripts/Fsr2.cs

@@ -42,7 +42,7 @@ namespace FidelityFX
         {
             switch (qualityMode)
             {
-                case QualityMode.UltraQuality:
+                case QualityMode.HighQuality:
                     return 1.2f;
                 case QualityMode.Quality:
                     return 1.5f;
@@ -109,7 +109,7 @@ namespace FidelityFX
         public enum QualityMode
         {
             Native = 0,
-            UltraQuality = 1,
+            HighQuality = 1,
             Quality = 2,
             Balanced = 3,
             Performance = 4,