Switching Units in Tools > Options Causes Loss of Data

Running windows 7 64 bit.

If you have a recipe that was made with hops in grams, then switch the units under tools options hops to oz your first hop entry goes to zero.  Others change also and go to nearly zero.  If you switch back to grams, all is well and they are fixed.  Calculations remain as they should during the error, if you try to use the add button it stays at zero but your calculations change.  If you edit the hop and manually change the value it still displays zero.

Thank you

Dustin

I would suggest leaving your settings alone and making the unit changes in the recipe itself.  When you are entering a recipe, you can enter different unit metrics directly in the box.  So, if you know the measurement in grams enter "111g" in the box and BeerSmith will automatically change the units to ounces (or what ever your preferences are set to).