Issue How to change mysql 5.1.73 port from 3306 to 3307

[Khalid]

Hello
I have my server windows 2008. I Installed (mysql 5.6. 3306)
After a period of time , I Configured plesk to work on it and Installed (mysql 5.1.73 , 3306) using plesk Control panel.

Now I am trying to Install Wordpress but it shows a long message error. After googling I found that the cause is that there are two mysql servers with the same port. So I have to change one of these servers port.

I tried to find the my.ini file but I found the following:
1- for mysql 5.6 :
C:\ProgramData\MySQL\MySQL Server 5.6\ my.ini
-------------------------------------------------------------------------------
2- for mysql 5.1.73 :
C:\Program Files (x86)\Parallels\Plesk\MySQL\Data\ my.ini
C:\Program Files (x86)\Parallels\Plesk\MySQL\ my-huge.ini
C:\Program Files (x86)\Parallels\Plesk\MySQL\ my-innodb-heavy-4G.ini
C:\Program Files (x86)\Parallels\Plesk\MySQL\ my-Large.ini
C:\Program Files (x86)\Parallels\Plesk\MySQL\ my-Medium.ini
C:\Program Files (x86)\Parallels\Plesk\MySQL\ my-Small.ini

I need to keep both servers, but I need to change (Mysql 5.1.73) port from 3306 to 3307.
Thank you