Below are links to the current firmware versions for the DPr, DPr/E01 and DPr-A digital transmitters.
These are zip files, after downloading extract them into a temporary folder. Each contains 2 files, one for the microcontroller and the other for the FPGA in the transmitter. Follow the instructions in the DPr Instruction Manual to update firmware. If you encounter problems while updating the firmware please contact the factory for assistance.