V3 930stock will not work on the V3 esc. It is made for the 2.0 and 2.1
The program box has nothing to do with the available firmwares. If you have downloaded the 930stock firmware. Did you recalibrate your transmitter to the esc? When updating new firmwares I also download twice to make sure it works right. But trust me when I say the v3 930 stock will work with your 2.1 the pc software will not let you download the V3 esc firmware into a v2.1 or older speed control. If you need more help pm me and i'll help as much as I can.
Roger