You need this version, worked for me with lml installed as well as ScriptHook. Now also, the Navy Revolver seems to have unlocked at the Saint Dennis Gun store as well! I was trying to get Read Dead Offline 1.3.3 to work so I could unlock stuff from MP and this fixed it!! 😉 Now I shall try WhyEm's DLC and see how it goes. 😄
I believe you need to download the Red Dead Offline Version of Why Em's mod so that it is compatible.
Step Two:
Red dead Offline Edition
Download Red Dead Offline and install it
Verify Red Dead Offline by running it first
Download WhyEm's DLC Red Dead Offline Edition
Unpack all contents in lml folder
Overwrite when prompted
Play game