How to open the new Lord of the West scenarios with the editor?

Hallo i am an AoE2 speedrunner and as such i normaly check scenarios via the editor to look for triggers and do my routing.

But the new campaigns from the Lords of the West DLC are saved as .gpv files instead of the old .aoe2campaign files. As of now the editor dosent seem to be able to load them like the old once and changing the files into .aoe2campaign files seems to destroy the data functionality.