Can't open View->DBA Menu in SQL Developer (Oracle 12C Standard Edition Installed)

Question

I have installed Oracle 12C Standard Edition. Everything works fine there. I have also connected the Oracle SQL Developer Client 4.0. From that I can access the tables, indexes

Answer 1

goto Menu of the Sql Developer windows-->Reset the Windows to Factory Settings

and then goto view menu ----> click DBA

it works.(Version 17.2.0.188)