diff --git a/Plugin/SSTUTools/KSPShaderTools/Addon/TexturesUnlimitedDebug.cs b/Plugin/SSTUTools/KSPShaderTools/Addon/TexturesUnlimitedDebug.cs
index 07db512..c3ca176 100644
--- a/Plugin/SSTUTools/KSPShaderTools/Addon/TexturesUnlimitedDebug.cs
+++ b/Plugin/SSTUTools/KSPShaderTools/Addon/TexturesUnlimitedDebug.cs
@@ -36,7 +36,10 @@ public void Awake()
             }
             else//button not null, but not debug mode; needs to be removed
             {
-                ApplicationLauncher.Instance.RemoveModApplication(debugAppButton);
+                if (debugAppButton != null)
+                {
+                    ApplicationLauncher.Instance.RemoveModApplication(debugAppButton);
+                }
             }
         }