Download and extract the contents of the IJOY Update installer zip file: 201611151602281294.zip Run "IJOY Update installer.exe" to install the software. This will install the "IJOY Update" program on your Windows PC. Remove atomizer/tank from the Captain. Open the battery door but do not remove the batteries. While pressing the fire button, close the battery door. Connect your Captain PD270 to your PC with the provided USB cable. Run "IJOY Update" and click the 'Choose' button to open "The Captain PD270_v1.4.dfu" file. Click the 'Update' button. Disconnect the Captain from the PC. Open and close the battery door while watching the mod's display to verify you have successfully updated the firmware to v1.4. Hope this helps!