fix：1、修复bug 2、删除不用的代码和资源，sdk等

Assets/MaxSdk/Scripts/MaxSdkUtils.cs

@@ -12,7 +12,7 @@ using UnityEditor;
 
 #endif
 
-public class MaxSdkUtils
+public static class MaxSdkUtils
 {
     /// <summary>
     /// An Enum to be used when comparing two versions.
@@ -488,6 +488,13 @@ public class MaxSdkUtils
         }
     }
 
+    public static bool IsVersionInRange(string currentVersion, string minVersion, string maxVersion)
+    {
+        var greaterThanOrEqualToMin = string.IsNullOrEmpty(minVersion) || MaxSdkUtils.CompareVersions(currentVersion, minVersion) != MaxSdkUtils.VersionComparisonResult.Lesser;
+        var lessThanOrEqualToMax = string.IsNullOrEmpty(maxVersion) || MaxSdkUtils.CompareVersions(currentVersion, maxVersion) != MaxSdkUtils.VersionComparisonResult.Greater;
+        return greaterThanOrEqualToMin && lessThanOrEqualToMax;
+    }
+
     /// <summary>
     /// Compares its two arguments for order.  Returns <see cref="VersionComparisonResult.Lesser"/>, <see cref="VersionComparisonResult.Equal"/>,
     /// or <see cref="VersionComparisonResult.Greater"/> as the first version is less than, equal to, or greater than the second.
@@ -573,6 +580,16 @@ public class MaxSdkUtils
         return !string.IsNullOrEmpty(toCheck);
     }
 
+    /// <summary>
+    /// Check if the given array is null or empty.
+    /// </summary>
+    /// <param name="array">The array to be checked.</param>
+    /// <returns><c>true</c> if the given array is <c>null</c> or has zero length.</returns>
+    public static bool IsNullOrEmpty<T>(T[] array)
+    {
+        return array == null || array.Length == 0;
+    }
+
 #if UNITY_EDITOR
     /// <summary>
     /// Gets the path of the asset in the project for a given MAX plugin export path.