notepad++ help

i got rid of notepad++ because i taught i didnt need it anymore and then 3 days later i wanted to some more scripts so i redownloaded it and now the highlighter doesnt work i have downloaded it and whenever i open a new tab on toepad++ it suddenly works please help this is very annoying

Forgot to change the default viewing syntax for lua files? Just select a language, download g-lua plugin if you want for better highlighting.

from the plugins i have the gmod lua lexer and ive gone to langiage and selected gmod lua and it still does the same thing unless i open new tab