CuteStat Lite has a default rating text as Rating by CuteStatLite which can be changed simply by editing language file.

First of all make sure which language you are using by going through Admin Panel > Website Configurations and checking the value of DEFAULT_LANGUAGE. By default it will be en_US.

Now, modify the file having same filename located at /inc/locale/ as below:

​FIND:

$lang["stat"]["label"]["rating"]

​And Replace the text CuteStatLite to whatever you want.

Now, clear your cache from Admin Panel which can be found under Utilities.