diff --git a/crates/cord-gui/src/app.rs b/crates/cord-gui/src/app.rs
index f05ea63..0905eef 100644
--- a/crates/cord-gui/src/app.rs
+++ b/crates/cord-gui/src/app.rs
@@ -429,7 +429,7 @@ impl App {
         {
             match ext.to_lowercase().as_str() {
                 "scad" => { self.mode = InputMode::Scad; return; }
-                "crd" => { self.mode = InputMode::Expr; return; }
+                "crd" | "obj" | "stl" | "3mf" => { self.mode = InputMode::Expr; return; }
                 _ => {}
             }
         }