SASE: Table Properties (foreign keys)

When trying to use Table Properties in SASE, I cannot define the 'referenced columns'

The columns I'm trying to reference are both the same datatype, but the names are different.

It won't let me hand enter or pull down any column names from the referenced table. Am I doing something wrong?

*Edit: I made two fake tables both with the same column name and data type and it still won't let me make a foreign key.

*Edit2: I was using it wrong, I wasn't using the referenced column box in the column picker below.....

Drop-down arrows in the grid cells are rendered only when cells get input focus.