[ADDED] a quick check to make sure that the path needs to be not null or empty, as well as an actual valid path

Author: AJubrey

Assets/FbxExporters/Editor/FbxExportSettings.cs

@@ -725,7 +725,7 @@ public static void SetRelativeSavePath(string newPath) {
         public static string GetIntegrationSavePath()
         {
             //If the save path gets messed up and ends up not being valid, just use the project folder as the default
-            if (string.IsNullOrEmpty(instance.IntegrationSavePath.Trim()))
+            if (string.IsNullOrEmpty(instance.IntegrationSavePath.Trim()) && Directory.Exists(instance.IntegrationSavePath))
             {
                 //The project folder, above the asset folder
                 Directory.GetCurrentDirectory().ToString();