This was helpful - it's the only info I can find on this topic related to GrowFX. There is a problem however - if you convert this to editable mesh all the texture mapping is lost. Unless I'm missing something?
I am no longer able to enter values in the curve editor window. It will not let me enter values once a point is selected. It appears there is something wrong with the editor dialog as part of it is off screen and it cannot be resized.