When installed this mode I got an error telling

The addon "<color=255,128,0>Gmod Flight Simulator - WIP</color>" likely conflicts with the addon "<color=255,128,0>Crappy Simple Player Radar</color>" because both have the following file:

lua/autorun/simple_crappy_radar.lua

I tried factory resetting the game, removing all other addons, and running the Chromium 64-bit version, but it didn't help. I also can't find the simple_crappy_radar.lua file in the directory shown in the error. Please help me.