Open Third person animation project in UE4.6.1
Open CharacterAnimBP
Open any animation with a Montage or create a Montage
Right Click on the Montage to create a new Branch Point
Name it something easy to identify like "TEST"
Open Event Graph in CharacterAnimBP
Right click to "Add Montage Branching Point Event"
"EventMontageBranchingPoint_TEST" will not be present
Save all and close Editor
Reopen editor to this animation project
Open CharacterAnimBP to event graph
Right click to "Add Montage Branching Point Event"
"EventMontageBranchingPoint_TEST" will be present