If you're willing to extract and edit the addon you can fix Gowron's textures.

In stargazer/startrek/klingon/gowronpm/Gowron open the gowron.vmt and uniform.vmt.

use VTF Edit

in gowron.vmt change "$basetexture" "stargazer/startrek/klingon/gowron/Gowron" to:

"$basetexture" "stargazer/startrek/klingon/gowronpm/Gowron"

and in uniform.vmt:

change "$basetexture" "stargazer/startrek/klingon/gowron/Uniform"

to

"$basetexture" "stargazer/startrek/klingon/gowronpm/Uniform"

make sure to save both.

the in the "lua" folder create a new folder called autorun and drag the stargazer_klingons.lua into it.

Whack the whole stargazer_klingons folder into your addons folder and Qapla"