DM800seV2 flashing

Hi, I am rather new to this and would appreciate if anybody could indicate how I can flash my DM800seV2 and what software I need to use. I have been trying all methods as indicated in the various tutorials around but none seem to work. Grateful for any help. Tks.

Thanks for your reply master G........ problem is the that I tried the browser feature but the Dreambox Webcontrol page that comes up does not have the firmware update feature anywhere. I will try to figure out the Optiflasher option.