How to resolve Unity DTM updating get freezing by

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How to resolve Unity DTM updating get freezing by "confDTMcom.confDTMcom"?

To fix this issue, please do the following steps:
Run REGEDIT.
Find HKEY_LOCAL_MACHINE \ SOFTWARE \ Classes
Find the entry "confDTMcom.confDTMcom.1"
Remove the entry "confDTMcom.confDTMcom.1"
Then you will be able to update the DTM catalog in Unity.