Try to edit them and save .lub, this is how I do.
Be sure to put in the right folder.
data\luafiles514\lua files\skillinfoz\skilldescript.lub
data\luafiles514\lua files\skillinfoz\skillinfolist.lub
Note: Save the .lua archives and edit them. Save as .lub. Don't lose the .lua archieves.
Test and tell me pls.