"Advanced Settings" button and "Sync Log" button appear in Google Settings page after a sync setup is completed.
In Advanced Settings page, you can change the download mode etc. "Sync Log" shows you the last 25 sync reports.
You should not change "Download Mode" if not necessary (the best mode is automatically selected at setup).
"Multi-parent Warning" determines the action when items that have multiple parent folders in Google Docs found. You can choose YES to show alert pop-up or NO to automatically correct the parent folder to one (last created one will be selected).
If an item has multiple parent folders in Google Docs but only one folder is the sync target folder, no change will be done to the item.