Hi again,
If you have installed the plugin and taken a quick look in the settings screen, you will have probably noticed the area where you can customize the map style, see screenshot.
We have included instructions and a couple of links there that you can follow where you can download tons of ready-made map customizations, some of them without labels in the map. You have to pick a style that suits you and copy-paste the styling code into the wp store locator settings. Take a look here and here.
This, the map styling, is a service provided by Google Maps, not by ourselves, so read the instructions and follow the links to get your customization.
As you see, all it takes is a bit of reading. On a final note, please be aware this is free suport from a free plugin, we do our best ??
Regards,