If you have RG Launcher, press watch on the overview tab, then install/update via the launcher on the update tab
Install folder should be as follows inside your MQ folder
LUA (folder)
|--Scriber (folder)
|--|--Merchants.lua
|--|--Write.lua
|--|--Init.lua
Ethernere and Overtheretwo do have mesh issues if you are not updated. If you have issues, go to the discussion tab of the scriber resource and the second post has the meshes attached. Place them in your mesh folder.
Resources (folder)
|--MQ2Nav (folder)
|--|--Overtheretwo.navmesh
|--|--Ethernere.navmesh