MySQL Workbench 6.3 (Mac) hangs on simple queries

Question

I am using MySQL Workbench 6.3.7 build 1199 CE (64 bits) on a Mac with OS X Yosemite 10.10.5. I am connecting to an Amazon RDS MySQL instance.

When I enter a simple

Answer 1

This seemed to help some of the time, but not 100%: Connect to the database with a different user, and then re-connect with the original user.

I'm about to downgrade like the accepted answer says though, as this doesn't solve it every time.