Christoph, thank you.
Unfortunately, this does not solve my problem. It seems that in version 3.7 the only way to see all the keywords I created is to highlight all entries in the database and select “Display keywords appearing in ANY entry” in the Manage Keywords option under Edit. This is cumbersome compared to version 3.6 when I could create a new entry and just click on the right side of the keywords field to display all the various keywords in the database.