I discovered that the automatic task-scheduled updates for MPCORB.MDB and MPCCOMET.MDB were no longer working for me. The tasks would start, the command window would open, but then it would close in an instant. This is a new problem related to the way the .dat files were no longer being downloaded from the Minor Planet Center. Bob might explain the technicalities better -- I won't even try. Shown here is the one-line change I made in both the UpdateCometFile.js and UpdateMPFile.js scripts.
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If you installed the task-scheduler updaters, replacing the corresponding .js files in the MPCORB folder and the MPCCOMET folder with these new versions will restore the capability.