This extension will remove other currencies from frontend except store default currency.
This extension will allow you to use only one currency(store currency set from store settings) per store. All other currencies will not be visible in store frontend.

Installation
1.Install this extension(currency_change_3.x.ocmod.zip) from OpenCart admin panel: Extensions->Installer
2.Enable and refresh from OpenCart admin panel: Extensions->Modifications
3.Go to Extensions->Extensions->Modules, then install and enable Currency Change module
4.Go to System->Settings->Store Name[Edit]->Local  Tab, Set Currency as you required for your respective store and save
5.Done