1. The update model feature is only available for models imported directly (Models imported through D5 Converter are not supported). 

If a model imported into D5 through D5 Converter needs to be updated, you can use the "Sync" feature of D5 Converter.

2. Save the model before updating it

After adjusting the original model, it needs to be saved once for the updated model to take effect.

3. The save path of the model cannot change automatically

If the updated model has changed, you need to manually re-select the path to the model file during the update.