There is no official OpenPLi for DM800HDse V2, you can see below the official page from OpenPLi, where there is no V2 (your box).

OpenPLi Official : https://www.openpli.org/download/dreambox/

The only image you can find, that is suitable for your DM800HDse V2, that is not official is the one below, from Japhar Team to the community.

DM800HDse V2 Original Box OpenPLi : http://www.ourdreambox.com/ubbthreads.php?ubb=showflat&Number=17593#Post17593

You have to work it by yourself (setup, bug fixes etc), as Japhar Team is only giving support to boxes upgraded to Japhar Sim.

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