Hello King555,
if so, then it means the LUB file is an encrypted one, not a regular text file saved with lub extension (well, of course I know about this one. what the freaking awesome you are talking, Winz?)
Editing an Encrypted LUB file needs another application to decrypt it and save it to lua first.
You may want to get the lua file, edit it, and save it to be the lub file instead of decrypting and re-encrypting it.
Have a nice day!
*to encrypt your lua file, get luac5.1.4.exe then put the files that you want to encrypt, then open Command Prompt ([Win Logo] + [R]) then type cmd, enter.
take a "cd" to your saved luac514.exe directory and execute this:
luac5.1.4.exe -o newfilename.lub oldfilename.lua
*If your luac514 is in D:\Downloads\, then you need to type this first:
d:
press enter, then this:
cd Downloads