Will upgrading from 5 to 5.5 mysql do any harm to any version of cscart? I am wondering because I know php upgrade does effect software what about mysql
I am curious too.
I will be creating a new data base for v4.2 and I have this option too.
Maybe cscart team can ring in. 
Check Server requirements here
[url=“CS-Cart System Requirements — CS-Cart 4.15.x documentation”]https://www.cs-cart.com/requirements.html[/url]