Download and install the new firmware for the latest bug fixes, tweaks, and improvements. Instructions can be found here:Installing Firmware

If you've run the advanced delta calibration, make sure you save your EEProm before wiping it and installing the new firmware. The values you'll want to save are Tower Endstop Offsets (X, Y, Z), Diagonal Rod Lenght, Horizontal Rod Radius, Z Max Length, and Tower Alpha Angles (A, B, C). You could always do the advanced calibration again instead if you want to.