Using CC 2015 and clicking on the File drop-down menu cause the spinning beach ball. The Force Quit Mac OS window shows InD not responding. Then after about 45 seconds or so, that clears up and InD is functional again, but still has the same problem with the drop down menu. I have uninstalled, reinstalled, installed Muse and Dreamweaver as some recommended. Still not working. InD stalls when I click on the drop down File menu. All the other drop down menus work OK and this happens whether or not I have an InD file open. I am running OS 10.10.5 on a 2013 Mac Pro with 64GB of RAM.
Go to File Handling preferences and set the number of Recent Files to 0.
Thank you Steve, that worked!