DCA1000EVM: How to program packet delay on DCA1000?

I have downloaded the Lattice Diamond Programming Tool, but I am unsure how to change the packet transmission delay from 25 us to 50 us. I have been experiencing packet loss when capturing ADC data with the DCA1000, and hope that increasing packet delay will reduce packet loss. The only guide I found to FPGA programming with respect to the DCA1000 was in the User Guide in section 9, but this section is not very detailed. I do not want to make any changes to the DCA1000 without knowing how to fix them if I do something wrong. Thank you in advance for your help.