Merge pull request #6

Fix for v1.9.0 by. w-e-w

Author: Haoming02

.gitignore

@@ -0,0 +1 @@
+__pycache__/

scripts/res_xyz.py

@@ -3,7 +3,7 @@
 
 def grid_reference():
     for data in scripts.scripts_data:
-        if data.script_class.__module__ == 'xyz_grid.py' and hasattr(data, "module"):
+        if data.script_class.__module__ in ('scripts.xyz_grid', 'xyz_grid.py') and hasattr(data, "module"):
             return data.module
 
     raise SystemError("Could not find X/Y/Z Plot...")