Q: Apple Remote Desktop crashes

I am running ARD 3.8 (3.8.1) on a Mac Mini under OSX 10.11.1.  Until today, I had no issues.  Now I am getting a crash whenever I try to start the program.  I've looked for the 'com.apple.remotedesktop.plist' file in /library/preferences, but it does not seem to exist.  I did find a file called 'com.apple.remotedesktop.plist.lockfile' and removed that, but this did not fix the issue.  I don't want to delete my database and other customization, based on the info on this page (Uninstall or disable Apple Remote Desktop - Apple Support).  I tried deleting the app and reinstalling from the app store with no luck.   I am able to run the app under a different account on the same computer, but again, without my database or customization.