The Default Save Path is a field in the output for the Merge Template Listing report.
To produce the report:
1. Navigate to Manage Document Templates (main menu)
2. Click the "Reports" toolbar button
3. Select the "Merge Template Listing" report
4. Select The Export Option "Raw XLS"
5. Type a filename for the output
6. Open the output in Microsoft Excel
There is a column called "DefaultSavePath"