Bug in refractometer tool

When you go to the refractometer tool and switch between the calculation type by clicking in the drop-down box, the labels for the input values don't always update to reflect the parameters for the calculation.  For example
Open refractometer tool and it's set to whatever you previously had selected.  In this case "original gravity of finished beer".  The input values are "refractometer reading and Hydrometer reading".  If you then switch the drop down box to something else, say "fermenting wort gravity", the labels remain unchanged.  If you close the refractometer tool window and re-open, the labels are switched to the correct "refractometer reading and Original gravity"

Expected behavior:  change the labels when changing the calculation type

Beersmith 2.054
Windows 7 64-bit

Also would add that the labels are incredibly poorly worded. I almost always need to review the help file to ensure I'm entering the correct data into each field. Especially in calculating the SG of a fermenting beer. Instead of Hydrometer Reading, that should simply say Measured OG.