Where to download the latest version of libmysql.dll and whether it needs to be updated frequently

 
Hello everyone~
I want to ask everyone a question
Impot libmysql.dll when developing ea
But when MySQL will have an updated version
Where do you go to download the latest version of libmysql.dll?
(64-bit and 32-bit versions)

Suppose I downloaded the version of libmysql.dll when I was developing, when MySQL was 6.0.1.
When MySQL is upgraded to 8.0.1 after a few months
Is there any way to use the libmysql.dll file used by the program I developed at this time?
Or do I have to update immediately?

Thank you~