be more tollerant for changing binary format

vis3d/unity/Assets/_app/Scripts/DataPointProvider.cs

@@ -29,11 +29,22 @@ public class DataPointProvider : MonoBehaviour
 
     var stopWatch = new System.Diagnostics.Stopwatch();
     stopWatch.Start();
-    if (File.Exists(dataBlobPath))
+    bool readFromBlob = File.Exists(dataBlobPath);
+
+    if (readFromBlob)
     {
-      ReadDataBlob(dataBlobPath);
+      try
+      {
+        ReadDataBlob(dataBlobPath);
+      }
+      catch (Exception ex)
+      {
+        Debug.LogError(ex.Message);
+        readFromBlob = false;
+      }
     }
-    else
+    
+    if(!readFromBlob)
     {
       ReadCSVFile();
       WriteDataBlob(dataBlobPath);