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I had a similar problem with SSMS 2016 16.3 A solution described in a comment has worked for me.
I just had this issue with SSMS 2016 (rel 16.3). I tried the repair option on the installer which had no effect. I came across the following post which suggested to remove a registry key (HKCU\Software\Microsoft\SQL Server Management Studio\13.0_Config) which solved the issue for me. Not sure why repair didn't do this if it's a known issue, https://social.msdn.microsoft.com/Forums/sqlserver/en-US/634911c8-8c85-46c7-aa9d-00c842cefb52/
You also can take a look at other ways suggested in that question to fix the problem.
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Removing this folder solved my problem as well. I did a quick comparison between old and new, some items in the folder appeared to get missing:
Maybe this helps anyone fixing the real solution ;) ...
Wow. I can't remember the last time a suggestion such as simply removing a registry key actually worked – user15507 – 2016-12-23T22:06:08.103